He's raw, we all know this, but from the reports I've read, is that he is ascending quickly, and can develop quickly enough to be a factor in his first year. The fact that he is a physical WR, and loves to block, and is damn good at it, is a plus, given the style of play the Jets plan to deploy this year.
His size and speed alone adds a threat and a dynamic to the middle of the secondary, and forces the safety position to adjust, and taken out of the play. This will be especially beneficial in the Jets running game, the wildcat, and in play action, all of which will be staples of the Jets offense under Sparano. This is something the Jets didn't have last year with Burress. In Schilenz and Hill, they have two players that can be very effective at the X position.