They have some great tunes but they've never made a great album, they're all at least half filler. I've seen them live a few times and they've got an excellent hour and a half set but unfortunately they drag it out for another hour on top of that.
I'm a big fan of everything Dave Grohl has done away from the Foos. Nirvana, QOTSA, Killing Joke, Probot and Them Crooked Vultures were all brilliant.