IMO Deftones has yet to release a stinker (havene't heard KNY yet). I even liked SNW except that outerlude on "Pink Telephone" ruined that song.
they're one of the most important and consistent rock bands of our time, though i'm not a fan of SNW and Koi No Yokan. speaking of the latter, it's quite different from Diamond Eyes instrumentally but also the closest vocally (same vocal approach/catchy choruses). it's not as experimental as i expected and drags along for too long imo. you should hear it quickly !