He's okay, a spurs mate of mine (sorry @Hassony no shade being thrown!) thinks he's decent 1 on 1 but otherwise average. I agree, he's defensively suspect, overly reliant on his pace and has lapses of concentration.
But saying all that, we need numbers, he can play both sides, so I'd much rather have him than not. He also knows the league.
Not a great endorsement but Bill & Ben have really messed up our squad planning / building.