Professor Musumeci is a great teacher. He has an accent, but you can understand him most of the time, and his accent makes the lectures more interesting. Most of the time he will try to keep students interested. His tests are not too easy or too hard, but I recommend that you take the time to study for it. There are three questions on midterms, just like other physics teachers.
Reading will greatly help in this class, but the problems Musumeci does in class are very similar to what appears on tests. He also provides old tests for students to study. Students would have to use Mastering Physics to do homework, but thats as worst as it gets. Otherwise, I recommend him over other teachers if you want a class that isn't difficult.

Professor Musumeci really wants you to learn the material in physics, and usually does it by getting to the core of the course aka - he does many derivations, but they do eventually help you in the end. He makes the class interesting to be a part of and is very willing to help you during his office hours. He's a very blunt person though, so make sure you know exactly what you want to ask or talk about during OH. I would recommend his class, mainly because his tests are difficult but doable, and are challenging but very helpful for the final. He also puts past midterms from last quarters up on the website for students to practice with, which I found very helpful. Overall, he enjoys teaching physics, and those who take his class may find it enjoyable as well.

Musumeci was a great professor; my favorite of my first year at UCLA. He's a young Italian guy with a sweet accent, and very funny. He also cares a lot about student learning, and is a good lecturer. some people complain that his tests were hard, but that is not completely true. The tests are slightly more complicated than the homework, and if you understand the concepts and can conceptually think, you'll do fine. However, he does not curve generously. He told us after the first midterm that too many people got A's, and that only about 7 or 8 students should get A's. I thought I got an A easily, but ended up with a B+.

Alright flat out. I got a C+ in his class. I know, I know, most of you are thinking "blasphemy" but honestly I was never so glad to get a C+ in my life. I struggled constantly at the beginning of this course after having switched from being an English major to a Mathematics Major and since I took him late in the year I hadn't taken used any math since the AP tests senior year. I got around approx. an F or D on the first midterm and right on the mean on the second midterm. Fortunately Musumeci has a policy that if you show improvement throughout the course that he will take that into consideration when making the final grades. I now feel that if I were to retake the class that I would get at least a B in it.
Musumeci is Italian and hence has an accent which everyone seems to comment on so I thought I might as well too. It does not really impact the class though, I sat in the back row a few times when I was late and I could still understand him. However I do suggest getting to class on time if not early because the chalkboards can get really dirty over time making his writing difficult to make out sometimes.
His midterms and are not overly hard there usually just tends to be one little trick to each of the questions which is what elevates them past the level of a homework question. If you do enough practice problems and study the material you should do well. The biggest challenge going into the midterms is time management. You have one hour to answer three questions and this is where moderation is key. On the first midterm I spent too much time on the first question, which I got nearly full points on, but got almost no points whatsoever on the other 2/3 of the test. On the second midterm I rushed through all the questions quickly and went over them once or twice but on all of them I missed one vital portion of each question which brought me down to the mean(Ex: I got the properties of an inelastic and elastic collision mixed up on a short answer subquestion and missed several points due to that despite doing all the calculations right in the actual problem itself, I forgot about a small amount of gravitational force in the problem as a block was moved up an inclined plane, which exudes friction).
As everyone stated he has a good sense of humor which makes the course very entertaining. For anyone taking Physics 1A, I have to say that Musumeci is one of the best professors out there. I've heard of professors that utilize equations from math classes that are beyond the required and are not as caring as him.

Pietro is a wonderful guy. I took two upper div classes with him and worked in his lab, and I can say that he is both an excellent teacher and a mentor. His class is very entertaining and he took one of the hardest subjects in physics (E&M) and actually made it doable. He spent the most time focusing on the useful aspects of the material and ignored the unimportant stuff. It was refreshing to have a young and energetic professor for what are typically thought of as the hardest upper div physics classes.
Working for him has been great as well. PBPL (Particle Beam Physics Lab) is a fun lab with a bunch of great people. To any physics students out there looking for a good research opportunity, there seems to be funding, and PBPL is a great place to work.

His course is not particularly difficult until the second half of the material, for Diffraction and Interference. He knows what he is talking about, but for these sections specifically, it is hard to grasp what he is saying and his pictures suck.

Otherwise, his midterms are straightforward, but again, by the second half of the course, it's hard to know what formulas are relevant.

Musumeci is a great in class lecturer. I could follow him much better than Corbin and he was funny and gave cool demos. His tests were also reasonable. The Mastering Physics is of course an overpriced piece of crap but the homework problems were still useful in preparing for his tests. His lecture notes are useful and pretty organized. He is the best physics professor I have had at UCLA. He honestly teaches better in big groups - I found him to be not that approachable during office hours.

Honestly, this was the hardest class I took in the physics department here at UCLA, and I didn't learn much--way harder than 110B, 112, 18L, and the rest. Musumeci is a convoluted lecturer (probably because he treats us as though we already know the material), and the exams are unfair (derive the shape of a spinning planet, Euler angles of a satellite, etc). Suggestion: avoid.

Great professor. He clearly cares about his student's learning and can be funny at times. His lectures are clear and he explains things very well. The homework often took a long time but I felt the questions asked were relevant to what would be on the midterm. The sole exception to this was Lagrangians for me since the homework questions felt leagues easier than what was asked on the midterm. His tests are HARD, though, and I had difficulties completing them within the time limit. The average for the first midterm was ~70% and the average for the second was 48%. There's also a Mathematica portion to this class but it's nothing too bad (only 6 homeworks in total). He also gave two Mathematica projects as extra credit.

Prof Musumeci is great. His love of soccer and his accelerator "downstairs" is so funny. Lectures are very enjoyable and he is willing to stop to answer questions. The HW are hard (even though they are straight from Marion and Thornton which has a solution manual) because sometimes I can't even understand the solutions. The exams are timed for an hour which is stressful with the online format because sometimes you get unforeseen tech issues. The questions definitely hard, but at least our atrocious average (40 something percent on the second MT I think?) got curved in the end.
Beware, this class does have a 2-hr mathematica lab section that is not shown on the schedule and mathematica hw was 10% of our grade (mathematica was also on the second MT). It's not too bad though because you don't really have to go to the labs to complete the assignments, since Corbin posts his notebooks after every lab.