i've had mixed results with the tartine cookbook.
recipes that are awesome:
chocolate pudding--really delicious, but i stress the importance of using high quality cocoa and chocolate. i used valrhona cocoa (which has no equal, in my opinion) and el rey chocolate.
lemon-almond tea cake
recipes that suck:
chocolate pots de creme--they don't have nearly enough sugar
croissants--way too much butter (and for me to say that, they must really have too much butter)
lemon cream--way too eggy. yuck. i have a major problem with eggy custards.