No prem experience but he has played in champions league and went to the semis of the europa league with Basel.
Can't say I've ever properly seen him, but this is enough to make me think he's definitely worth a shot- he's played at the highest club level against some of the best teams around and still managed to give a good account of himself, more than once. To say he's carried Basel would be unfair on people like Stocker and Streller who have also played well in the CL, but he's been their outstanding performer most of the time.
Good buy at <£10m, but we still need more.