This show is one of those things that you don't know you're missing until you watch it. It has a strange mix of family, heart and morality. I'd describe it like this: Have you ever watched a show with some kind of comedic yet fast-paced bank heist? Something like Ocean's 11, in which you loved the characters, were intrigued by their devilry and cheered on their dubious success? Didn't you feel sort of sad saying goodbye? Leverage is like that ending except it continues on with episode after episode.
The characters are all very interesting and surprisingly developed.
Oddly enough this show is very endearing. Don't let promo pictures scare you off. This is the kind of show where the characters DO NOT look good stationary. But the actors look amazing in movement, even with a few cheesy sound effects (just straddling the line of making the point and relying on it). The fight scenes are actually good! I think that's one of the major checkpoints of a shoddy show, whether or not the fight scenes actually look believable.
This show has MUCHO potential. I can't wait to see it again.