Barnes was probably the most consistent defender on a horrible Suns defense last year. He is a guy that Mike Brown can work with on that end of the court, because he is willing to play defense, and he has the skill set to do it effectively. The big problem for him on that end has been that he's never played for a defensive oriented team, nor has he been coached by defense oriented coaches.
On offense he does like to shoot spot up jumpers. He will slash to the basket as well. The big problem I saw with him on the offensive end last year was that he was incredibly streaky, and his performance seemed to come and go. But, he was playing on a team that was in a transitional phase for the majority of the year. The first half of the season was spent with Terry Porter, and most of the players had a hard time performing mainly because their point guard played horribly. Moving from that environment to break neck pace under Gentry can mess a lot of players up.
Personally, I think that Barnes can fit in nicely for the Cavs. I don't think he can play PF, unless they're playing against an incredibly small team. He is fairly lengthy, but he is light.
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