It's kind of stupid actually, but the first thing I noticed was that his delivery looked exactly like Roy Halladay's. I'm not sure if he was a fan and tried to emulate Doc or something, but it was pretty cool. His delivery looks for balanced and fluid. If you watch full inning clips you can see that he repeats his mechanics perfectly almost every time. In terms of other stuff, physically he looks the part. Big, lean, projectable build. The ideal pitchers build really. Pitches off his fastball which has both tremendous vertical and horizontal movement, but it's movement that he look like he can control (unlike Sanchez). Locates his pitches to both sides. Likes to pitch inside against leftys, and the pitch has some natural cut to his glove side, and bore to arm side. It looked painful to foul a ball off him cause of where on the barrel the ball moved to. He's going to be able to get outs with his fastball period. His other pitches are still developing, but the curveball shows flashes of at least being an average to slightly above average pitch. It's not very firm yet. With his arm slot and the natural tail on his pitches to his arm side, I can see him developing a pretty good changeup, though I haven't actually seen him throw one. He's going to be a pitch to contact guy though.
Also check out Tanner Houck and Gavin LaValley if you guys get the chance. I liked what I saw from them too.