Now that I've actually worked with the book a little, I can only recommended it with qualifications. It is more down to earth than other Thomas Keller books, but that also just makes it seem like there is less of Thomas Keller in it. Many of the main recipes are staple fare--roast chicken, roast pork, etc. and the only mark that might make them Keller-like is the obsessiveness with which things are cooked slowly and in separate pans. The instructions are really detailed in all the wrong places. It'll tell you how to cut a Kobacha squash into 5/8" dice, but it won't tell you how to peel it. In fact, if you follow the instructions literally, you're supposed to peel it before you even make the first incision, a task which I imagine would leave many people with sorely nicked knuckles. In some ways, the details that are there may even make it easier to screw up. Especially since he likes cooking many things on the lowest cooking temperature possible. So even if you get your squash into uniform 5/8" dice, a little difference in your stove top is going to still lead to greatly varied cooking times. I didn't mind so much, since I know when it's supposed to be ready, but still, in many cases I had to wait a good 50% longer than expected.
In the end, I trust his recipes as I have in the past for things like roast chicken. They're simple on ingredients, and long on process--and that's generally a good thing. But it's mostly the same process recommended in about a dozen other cookbooks under the title of "high roast," and the one in Judy Rogers's The Zuni Cafe is better described and, well, just better. That said however, the book shines in the side dishes, condiments, and the cheese primer. After you're done making your traditional, yet unremarkable roast, you can serve it with a rice and squash dish that includes farro, black rice, kobacha, delicata, and butternut. This will take twice as long as your main course to prepare, and take twice as many dishes. When he tells you to cut every squash in a different way, and to use a different roasting pan for each squash, you'll probably here the voice of SNL's The Anal Retentive Chef. But that's just him. That's Thomas Keller. And if you bought the book expecting anything different, you shouldn't have bought it all.