I used the Kaplan 2007 PCAT book (not the course books, the one you can buy at Borders) and I took the test in June. I think the Bio section was pretty good and covered most of the material on the test, minus Microbio. There were like 5-7 microbio q's on the test and kaplan did not prepare me at all for them.
Basic chem was covered pretty well in the kaplan book (most q's were actually harder in kaplan) but completely lacked organic review (which comprises 40% of the pcat). So def do something else to prepare you for orgo.
For math, kaplan covered geometry, which you should really just skim through. The rest is good although you should brush up on integration/diff polynomials, e^x, ln(), log(), and trig functs. Also know the LOG properties.
The reading comp was actually harder in Kaplan, (I finished way early on the actual test) and the vocab was about equal.