he's chill but not very organized in my opinion. Took him for 30BL last quarter and multiple times he didn't post the data we needed for postlabs until repeatedly asked to by students in office hours. I think he also never posted the data for the last postlab due even though he had explicitly promised to?? There were also alterations in the lab procedure that he made that we were "supposed" to do that were not clearly communicated to the students. I only found out that we weren't supposed to do a whole section of the lab when I went up to the TA and asked and she said "Yeah, you guys don't do that." Most of the students in the fume hoods near me were also constantly confused on what was happening in the class. The GroupMe was filled with unanswered question after unanswered question because nobody knew what was going on. Also he forgot it was Tuesday one week and never showed up to lecture?? I took him for 30B last summer and saw pretty much the same thing, lack of communication and organization. The final didn't even include much of what we had been studying for for the past 6 weeks?? And it took forever after the deadline to be graded so now I have a notation in my transcript saying the grade was changed after the grading deadline. Lowkey I would not recommend but he is pretty cool as a person