Good, but...
MotP is good, but my top favorite reads so far have been Rokugan and d20 Call of Cthulhu.
Rokugan hits a great balance of setting, crunch and cool goodies. d20 CoC has a fantastic treatment of the Mythos (particularly for people new to it) and some very clever mechanics - like its take on psychics.
As far as MotP goes, I got a chance to see some of A. Swekel's excellent artwork at the last GenCon, and some of his best stuff came from MotP, IMO. Really, really nifty.