I think he's a great player, but I'm not into "fretwankers" as I call them, too much showing off and not enough soul for me, prefer guitarists like Hendrix and Gilmour personally, but I wouldn't turn my nose up at free tickets to see him!
P.S I know Hendrix had tons of gimmicks etc. but his playing at least had some feeling to it and not just 300 notes per minute via frantic tapping of the fretboard like a 5 year old playing Street Fighter 2 on the Super Nintendo