I haven't taken the PCAT yet, but I'm registered for the October exam, and I'm using the Mcgraw-Hill book as my primary source at the moment. However, I am supplementing it with other review books. I'm also not done studying, but here's what I've gathered:
1) The verbal section is very poor. There are no vocabulary lists, but there are affixes. I had planned to get a master's before going this route, so I had some practice with GRE vocabulary. Search the internet for GRE words. The analogy section was also scant, also. Just search the forum to find the main groups of analogies: synonyms, antonyms, part/whole, etc. Anyway, some of the analogies in M-H surprised me, and since I haven't taken the test yet, bought an official practice test (which I plan to do soon), or browsed another PCAT guide, I can't say how true to the test they may be. For example, one of the analogies in the diagnostic compared Bethlehem to Mecca (the birthplaces of religious figures). I can't imagine that a test like the PCAT would have religion on it... If somebody could elaborate on this point, I'd appreciate it because I'm still confused by this. Also, I've read others' advice to review GRE words, but there were no "big" words on the diagnostic, as far as I was concerned...
2) Math... This part was okay, from what I could gather. It started with algebra and ended with basic differentiation and integration. I haven't had a statistics course, and I found that respective section to be lacking and am still not confident when doing statistics worksheets I've found on the internet.
I just started biology and chem, so I can't say much yet. And I'm saving the writing for last.
If you're in college, check your school's library databases. Some of them may have internet access to PCAT books, other standardized test guides, and other review books, like AP books, Schaum's Outlines, etc. for specific subjects. Thats what I'm doing to save some money.
Hope this helps.