I've been watching the american one for the last couple months and it's really good. The US one has Adam Levine (Maroon 5) Christina Aguilera, Cee Lo Green and Blake Shelton.
Through the blind auditions it's com as sometimes I think they regret pressing their button so then they have to try to steer the contestant away from themselves without making it obvious
It's season 2 over there so they all have built up a bit of a rapport and the banter is great. I'll have to catch the UK one on iplayer or something tomorrow as I was busy earlier when it was on.