I really liked Night Watch, but ended up taking a long time to finish Day Watch, and even skimming it. I read them maybe seven years ago, so don't really remember why, which is a bit irritating. I know I always meant to read on, but didn't.
I have been thinking of go back to the series, but since I now have to reread the first two, I probably never will. Day Watch became a bore to read for me. I still remember Night Watch as a very enjoyable read, so who knows, maybe I would feel different about Day Watch second time around.
You don't mention what kind of urban fantasy you read, but I say if you think Night Watch sounds interesting, try them! Don't read if you don't like plot twists, or don't like stories with moral dilemmas and ambiguity though
