It is the best series I've seen in a while, different vein from the sci-fi series I usually love. This one is about death mostly. About grim reapers in a modern setting. Yes it's dark. But also thought-provoking.
There are only 2 seasons since it got cut :( I guess the humor was too dark for many.
Some of my favoritist series:
Sex in the city
Star Trek TNG
Dead like me