I saw him at Winfield about 3 years ago, and he literally blew the whole crowd away. People pretty much talked about no one else, and by Thursday afternoon, the crowds were overflowing every time he played.
The thing I like best about him, is that he's not only a phenomenal guitar player, but also a great entertainer. He plays the crowd at least as well as the guitar. If he comes to your area, beg borrow or steal a ticket. You won't be sorry.