Actually, SPC offers a few higher level science courses. These are primarily for the science education majors, but they will let in those post-bacc students doing their med school/pharmacy pre-reqs there. I took Biochem (3000-level), Genetics (4000-level), and Physiology (4000-level) at SPC, along with my pre-reqs.
The reason I chose SPC is because USF is extremely poor at getting post-bacc students registered because they have least priority in the registration process. By the time the freshmen, sophomores, juniors, and seniors are registered, you're left trying to get into whatever classes they didn't want. If you're a non-trad, try USF, but it's going to be hard to get into the classes you want/need. I also looked into the University of Tampa, which is where I really wanted to go. Too expensive. I couldn't justify paying 40-grand for a post-bacc I could do at SPC for a fraction of the price.
OP, I had no trouble with SPC. The professors were WONDERFUL, I learned a lot, collected a bunch of LORs, and no school said a word about it. In fact, both MD and DO schools were very complimentary of my post-bacc record, both in Florida (where SPC is known) and out-of-state. I think one of the perks of SPC is that the classes are small so the professors really get to know you. My largest class had 90 people in it. My smallest had 12. I was able to go to office hours for help, open lab for tutoring, and even organize study groups and review sessions with the professor coming in on her own time to help us review for exams. It was a great experience!
One thing I will say, though, is that if you go to SPC, don't take any "easy" professors. The harder the professor, the more you'll learn. Also, review for the MCAT as you're going through the classes. A few of the professors will design their tests like an MCAT or PCAT exam, testing theory and critical thinking skills, but the majority don't. When I got to the MCAT, I knew the material, but it was difficult to transition from the Chem tests I had been taking, for example (all problem sets), to MCAT-style tests.