I watched Yedlin a lot when he was with the Sounders. He's quick, his crossing and passing is actually quite good, and he makes smart overlapping runs. Defensively he was a bit weak but I wouldn't be surprised if a year with Allardyce helped him out there. He's not the finished article yet, but he's better than what we have, and he's still young enough to continue to improve. He's got a great attitude, too, or at least he did when he was with Seattle. Dumb hair, but works hard for the team.
Oh, and Sunderland fans have been bitching all summer that they haven't made a permanent move for him.