Other reviewers have compared it with several other shows - I think the most relevant comparisons are with Misfits and Northern Exposure. Don't expect a Heroes style epic adventure, the stories are on a smaller (more human) scale, but very engaging.
The character development is nicely handled and by the end of the season I was really interested in all the characters - even the ones that annoyed me at first.
Some of the acting is a bit soapy hence my lower rating but it's a great concept, well executed and the story gets better and better as it develops. I can't wait to see where they take it next season!
UPDATE: Having watched and re-watched all the episodes of the first 2 seasons and having just finished and digested watching season 3, I felt I really needed to update my review, written after watching season 1. I have upgraded my vote from a 7 to a 9. I only marked it down (from an 8) originally because I thought some of the acting a bit soapy, but on reflection it wasn't the acting, it was the lighting, and this improved by season 2. The stories are creative and compelling and human; the actors play their parts really well. It just gets better and better as the seasons progress. I was worried at the end of season 2 that it would jump the shark if it continued, but season three was just utterly AWESOME! That is what pulled it up to a 9. There are very, very few shows out there as good as this one. It ended beautifully, but with a sneaky little something to leave a door open to continue and I really, really hope they do.
