[Comic Book Guy Voice]
As it stands, they are poorly written overall, unclear and/or vague on many issues, ugly (to me), hard to read because of poor layout, and full of errors. It's quite obvious that WOTC has done a infinitely better job with presenting the d20 system with more recent books like the SWRCRB, CoC, and WoT (though they are still bland and read like a college textbook)
As it is now, I use WoT for general rules reference because I cannot stand looking through the 3E PHB.
[/Comic Book Guy Voice]