"one of the best drummers in the world"

oh thats a big call.

He was already an established drummer well before his first tenure in KISS. He played in Alice Cooper's touring band for a couple of tours and then landed the job replacing Eric Carr. I've seen him live a few times and he never fails to impress. Obviously not a legend in the same class as Peart, Bonham and co, but I still think he is one of the better drummers going around. My favorite is Mike Portnoy. No modern drummer is close.