Hightower was a JUCO transfer with only two years of experience at the D1 level. His numbers:
As you can see, Hightower has a good yards per catch average. However, he's 6'1, 189, with a slender frame, so there will be concerns about his ability to beat press coverage at the next level. He ran a 4.43 at the Combine.
Here's a highlight reel, where you can see his speed:
Hightower makes sense as a late round developmental speed guy with some added value as a kick returner.