When I first saw the trailers for this series I was concerned that it was going to be incredibly clichéd, but I'm impressed so far by the way that it keeps you guessing - you can't work out how an episode is going to end just by watching the first 10 minutes, and it doesn't always automatically have happy endings.
The only complaint I would have is that the acting standards are a little variable. The regular cast are great (and Chris Kramer is incredibly good looking), but some of the weekly guests have been over-the-top.
We're way behind on this - only halfway through Season 1. I came in to check if this went on to further seasons. Glad to see that it did.