I'm thinking Joffrey Lupul is a pretty good comparison. A guy that can probably hit 30 goals if not more in a season. If he gets the chance to play on Staal's wing and they click at all, I'd bank on more.
He's a talented goal scorer who can play in his own end. Not overly physical, but his last year in junior he showed that he's willing to dig deep and battle. I would say he's a 30+ goal guy in his prime that can also play on a penalty kill.