The strikeout to walk ratio is the big draw there, as that is reputedly (and other #s tend to back this up...) a very good measure of a pitcher's control and ability to work counts and that sort of thing.
That being said, the fact that Kaz is on the Rays was enough to scare me off of him. He's supposed to have amazing stuff but I've never seen him pitch on TV. I did go nutso w/ young SP this year (Harden, Bonderman, OPerez
) but he's a wee bit too young for my tastes.