Some info about Burton, most of it positive.
An article on MSNBC draft preview of sleepers has him at number 5, saying if he changes his technique and turns some baby fat into muscle, he could potentially be a dominant NT.
5. Antwon Burton, DT, Temple
Burton might turn some scouts off because he is soft-bodied and fleshy and doesn't work out well. But focus on his play and it's clear he gets the job done. Burton has good instincts and quickness, which enables him to get off the ball very quickly. When he is aggressive with hands, he can jolt the offensive linemen and disrupt plays in the backfield. Burton has the natural strength to control offensive linemen. He is a consistently disruptive force against inside runs, and if he learns to bend his knees, he could become a dominant defensive tackle. Burton is never going to be a great pass rusher, but he has the talent to be a productive nose tackle.