Thought I'd chime my 2 cents in here.
I grew up down the street from CSULB and a lot of my friends from high school ended up going there. A few of them started as pre-meds but eventually changed majors (but I think that was mainly because they changed there minds about medicine).I also worked in a doctors office for a number of years in long beach and we had several CSULB students. So although it may be second hand knowledge I've heard several things about it over and over again:
-Most people will not graduate from CSULB in 4 years. This is because it is impossible to get classes that you need. From what I hear, you basically need to accumulate enough credit hours (junior/senior) in order to get the classes that you need. This may mean that you end up taking your pre-reqs over the course of 3 years which makes the courses themselves more difficult as well as studying for the MCAT. I know UCs are probably similar but i had friends at UCI/UCSB and it was never on the same level that I heard from my friends from CSULB.
Considering I went to a private school in LA i had several classes with <12 people in them (my physics II had 4 , upper division chem had 3!!) . I even got an entire course moved on the schedule after taking with the dean.
-Also, although I haven't lived in california for over a year I still hear that it's going down the drain. The UCs and CSUs are strapped for cash which means less classes and higher tuition.
-Parking is also a nightmare.
That's all I got for you. Good luck with whatever you decide!