I think Len is rather tired and formulaic now, though he's essential to give the technical background-when he's bothered to.
I like Darcey, she'll loosen up as the series goes on. She gives the show some semblance of class when it has gone increasingly shallow.
Craig is fine, though a lot of his technical knowledge is blagged.
I love Bruno, delve behind the put on panto schtck and there is a lot of kind advice and he seems genuinely concerned that the celebs do their best and rectify obvious faults that hold them back...mind, I don't understand on some of the most obvious ones that the pro has so signally failed to deal with them. Posture and frame was banged on repeatedly on the weekend. I understand it in sports people and non performance people, but it is hard to understand with the RADA and showbiz background people why posture and the ability to stand upright is so poor generally with a couple of exceptions.