Maybe, in a couple of years' time, these two instructors will be decent lecturers. For the present, they're just plain bad (consider the fact that Mowshowitz sat in on two of our lectures). Perez-Cheeks is marginally better than Lim, but I may be biased because I found her material more interesting.
The first couple of lectures were insanely rushed because Lim assumed we'd learned it all in intro bio. Like the previous review said, whenever Lim didn't like the Clicker responses, she'd tell us that we needed to review the material. The fact is, we never actually LEARNED that stuff in intro bio (at least not in such depth), which only covered the very basics. My main frustration was that with all the time she spent talking about how we needed to review intro bio material, she could have just taught the material to us.
Even when she did slow down to re-cap the more confusing concepts, it wasn't that helpful because she couldn't explain it any differently from the book. I'm fine with textbook lecturers if the textbook is any good, but our textbook was terrible, so Lim's offhanded responses ("Well, this was in your book, so take a look at that") were hardly reassuring. She also liked to work out problems on the overhead, but her explanation of the process sounded like something regurgitated and didn't really give us time to absorb the information.
Perez-Cheeks was at least a clearer lecturer, but she lectured heavily from an unassigned textbook (which was kept on reserve). With such a heavy emphasis on prokaryotic genetics, I wish they'd assigned us a more comprehensive textbook.
I think my main issue was that it was so obvious neither of them really wanted to teach this class. For the most part, they slavishly followed the textbook's explanations without stopping to consider whether the textbook was all that good at explaining the concepts. At the beginning of the semester, they told us that they would prefer it if we emailed the TAs instead of them because it'd be too time-consuming to respond to so many emails. On top of that, they didn't hold office hours because neither of them worked on the Morningside campus (the logic being that in the past, no one had bothered going to office hours when they were held at the medical campus... So why couldn't they have reserved a room on campus for an hour or two before each class?). This meant that if we wanted to ask them questions directly, we had to cram them into the few minutes before and after class. I'm sure a lot of people just resorted to emailing them anyway, but I was floored by how eager they were to distance themselves from the class.