I have watched quite a bit of his highlights. Two things stand out. 1) is his speed. Fast feet, can run decent routes. 2) is, while he makes a good number of highpoint, contested catches, when he's got his man beat hands down and the ball is in the air, he's not a comeback to the ball type of guy. 70% of the highlights I saw showed him belly catching the ball, instead of coming back to snatch and run. With his speed, he needs to get the ball asap and be gone, without waiting, and gut catching it.
All in all, great value for a 7th round pick in 2 years!