I like Hightower and have got to see a decent amount of his games. He's a really good player, who has been well coached, with a very high floor.
He also probably has a pretty low ceiling.
That isn't a bad thing, necessarily, and I won't snuff at them taking him in round one if that's how things break. He's worth the pick, fills a glaring need and will probably be a pretty good starter for whomever drafts him for a while. That said, I won't weep like a little girl if they decided to go a different route either, because I'm not sure he'll ever be a "game changer" at the NFL level.
As a late first though, it'd be hard to complain much about Hightower even with his deficiencies in coverage(Unless, of course, there was cleary some difference maker available that they passed on to take him).