A very caring professor!
I had almost no physics background when taking the class.
He assigns weekly online homework from Mastering.
You can drop lowest homework. If everyone was struggling with a specific question, he may give credit for that particular question for everyone (I remember there was a diagram where we had to put the vectors in a certain order/length, but Mastering was glitching a bit and he decided to let go of that question).
Homework can be long, so try to do in advance.

For the test, review the homework and do a lot of practice problems. He had the test on Kudu and you have up to three checks (tries) to see if the answer you got is correct, he recommends to use 4 significant figs.
Make sure to show work, in my session 65% of grade came from showing work and 35% for the correct numerical answer.
Focus both on the textbook and lectures (agreed with another reviewer that his lectures are great). Try to not fall behind.

I was doing very well in the class, until I got sick on the week of the 2nd midterm. (I couldn't study at all because I needed a 3-4 hour emergency surgery to remove 5 teeth because of a really bad infection. This lead me to being under heavy pain meds for an entire week).

However, he was very kind to drop a midterm (he allows it only under exceptional circumstance). My grade did spiral downward however, he was extremely helpful to me in office hours.
Even though I was recovering from surgery (I couldn't even speak for 3 weeks!) and did very horrendous on the final, I still managed to pass his class, again despite having almost no physics background and my surgery.

Please take him and don't be afraid of him in office hours!

As a person, Professor Gutperle is very fun and engaging. As for the course itself, it was very time-consuming. Homework was usually 10 to 12 problems on Mastering, and could take you several hours to complete. For online, the midterms were pretty straightforward. Some niche physical systems were introduced during them, but you should know how to analyze and do them if you pay attention and do the homework. The final itself was very difficult compared to the midterms. Thankfully, partial credit is given based on your submitted written work. In-person will likely be even more rigorous, but Professor Gutperle is probably your best shot at getting a high grade. My advice for doing well is to go through the readings every weekend before the lectures, work in groups during the homework, and do the optional practice problems he gives for exams.

Just don’t get behind on lectures, read the book, study before exams and you’ll be fine.

Coming in I had no physics background. Overall, this class online with this professor is as easy it's going to get. 3 tries per question to get full points is awesome. His lectures are great, but the homework can be a bit long. Keep in mind all physics professors probably use Mastering to assign homework, so it wouldn't matter what professor you get regarding homework. Midterms were easy as midterm 1 and 2 had averages ~90. The final was a lot harder than both the midterms, yet the average was still 88%. For physics1A at least, there is not going to be any easier professor for this course.

So I got a B- in this class but I don't think it's an accurate representation of this professor's teaching ability. It's my own fault that I didn't do so well, because I got embarrassingly behind in lecture (online but recorded) and it just snowballed from there. I also have zero physics background, while a lot of people in this class have taken physics/ AP physics in high school, and so this was a lot of review for them. For reference, I did rather poorly on the final, but the mean was an 88, so do with that what you will.
In terms of teaching style and personality, Gutperle is a very kind and approachable professor, and he has fun while teaching. He's really funny and tries to make things interesting for students. Each lecture, he gives us an 8-minute break during which he plays music and answers questions in the chat.
His lectures are a little disorganized, and so it can be hard to follow sometimes, so I found that reading the weekly readings were key to doing well.
There are 2 midterms and a final, which are around 12 questions each which 3 tries per question. 35% of the exam grade is correctness (through this thing called kudu) and 65% is your work which you submit through Gradescope.
Overall, Gutperle is a great guy, and it's very possible to do well in his class, but you have to stay on track and do the weekly homework and readings. (Having a background in physics certainly helps, although you don't need it).

gutperle was objectively good but i understood nothing at all--I come with 0 physics background and I felt that it moved too quickly for me to understand anything. it probably would have been fine for someone with any kind of familiarity with the subject but i really struggled, even despite spending hours studying. i felt that the practice problems were not comparable to the midterms in terms of difficulty, although that could be a result of me fundamentally missing certain concepts and links that should've made it easy. the problem is, when i'd do the homework, i'd understand how to solve problems that followed those exact same specific patterns--any deviations from that, and i'd just be completely lost. i didn't understand the formulas enough to apply them.

on the subject of formulas, i wish a formula list was given out for each midterm rather than us getting note cards because then i'd have a better idea of what to study and what to know. sometimes i just straight up didn't know an equation because there wasn't an easy clear-cut list of them to study; had i known it, the problem would've been really easy but i think burying them in the notes (which were moderately helpful, if a bit unclear) did not make things easier to find. i really disliked this class and dreaded coming and i felt like once i missed certain concepts, it moved too quickly for me to catch up. once i fell behind in one subject, it felt impossible to understand the rest of it. regardless, i felt like this was more of a failing with the amount of content and the quarter system than the instructor. i doubt having a different professor would've helped much.

also i scored significantly lower than the rest of the class on the second midterm (39%) vs the average of 80ish, so all this could just be a failing of me rather than gutperle himself. i don't know, this class just really lost me and as an introductory physics class, all it succeeded in doing was making me hate the subject. i don't feel prepared for 1b and i think i'll probably fail that.

Gutperle more like GOATperle. He was such an awesome professor. I took AP physics in HS so I was already quite familiar with the material going in but his live lab demonstrations were fun to watch and helped to understand the conceptual side of the physics. His first 2 midterms were pretty easy but the final was really hard, fortunately the graders gave a lot of partial credit. This man keeps up with his pop-culture! The answer to a problem was 6.66 something and he made a reference to Little Nas X and his Nike satan shoes, what a King. Also he has awesome music taste, really into that 70s-80s wave-type smiths -mazzy star - kate bush- dreampop music that i vibe with.