Watching highlights (in this case, not video), he's definitely a quick-twitch and a natural ball athlete. He looks tailor-made for slot corner and reminds me a lot of former Bills DB Tony Greene although a bit bigger all around.
Clearly he is a special teams gunner extraordinaire and his speed and quickness are deadly on the slot corner blitz (unblockable).
I didn't see him block any punts but it looks like he would be exceptional at it.
All of the Bills picks have a strong chance of contributing as rookies.
The first two guys are starters, the 3rd round wideout will get lots of reps in passing down sub packages, the first fourth rounder will challenge for a starting spot (over Morrison) and this kid Brooks looks to be perfectly suited for nickel corner playing the slot
The Bills are suddenly quite deep at cornerback.