As long as opinions are being bandied about without weapon sheaths, I might as well bandy mine.
With no disrespect to Ryan "Rangerwickett", While he had excellent ideas for class books (and fooled us all more than once), these ideas were not fleshed out and made playable. WHile I commend his work, I suggest that it not be compared to WotC's before BOTH are sitting on the table in complete form. Concepts are one thing, actual design work and playtesting are a whole other ballpark.
My assessments of the classbooks:
S&F - So far, only Sword and fist has struck me as the least useable, and that only because of the truckload of errors. The other books, despite having errors, was largely not unplayable because of them, whereas Sword and Fist was, until recently. Most of the weapons, Prestige classes, and Feats had errors of some sort in them (including the lasck of "Fighter" designation on certain feats).
DoF - Great book, once I had time to decipher it. A lot of DM's however, do not devote a lot of time to additional cleric information, or already have their pantheons fleshed out such that this info is not "planned for". For me, I found the "Turning" feats quite useful - never before has the Clerical Turning attempts been useful for something besides turning things!
T&B - Great book, nothing more needs be said. Only a few major mistakes (such as bladesinger).
S&S - Contrary to other opinion, this is my favorite book besides Tome and Blood. Rogues are always near and dear to my heart, and contrary to belief, the Bards are treated in this book - looking at the Feats (Requiem, Green music, the various combo feats for intimidation and diplomacy and info gathering), and the prestige classes (one of which is MADE for Bards), and devoting (what? 5 pages?) space to musical insturments was a great campaign enhancer - not every bard wants to carry a lute or a harp!

And in my opinion those really neat spells in the back were not there for the benefit of Rogues, either. In all, quite a useful book for Rogue players and those running an all-rogue or all-bard campaign.
MotW - I await this with great interest, because most of the feats in there will make playing a Barbarian or a Druid worthwhile to me. I have never played a 3E druid, and this book may make me want to play one. The Wild Shape rules alone will be useful to both Druids and Rangers, and may help make the class a little less front-loaded.
One of my hopes is that they make suggestions for an alternate "weapons code" for Druids - one that actually makes sense instead of the hodgepodge included in the PHB. I remember people on these boards trying to make an oath or vow that fit these weapons, and it was the wierdest exercise I have ever seen (besides the fight between the Halfling Commoner and the Kitty Cat.)
In short, I found the class books more useful than most here, apparently, and while they aren't perfect, they have found use in every 3E campaign so far we have played.