I have always thought that impersonations are just gimmicky, one step up from prop comedy. Although he is definetly talented, and I laughed pretty hard when I saw him do his Charles Barkley impersonation.(
http://www.youtube.com/watch?v=liYfDOCOB6o) But I still don't have much interest in seeing a show that main crux is impersonations even if they are done well.