I know that Tim Hasselbeck is really high on him for what it's worth.
“I said in the draft process that the best prospect at the quarterback position coming out this year – the most NFL ready without a doubt – was Blake Bortles,” Hasselbeck said. “I guess he’s kind of boring compared to Manziel. … But what he did under George O’Leary translated to the NFL. You could watch it and see it and it made sense. … Maybe because it’s Jacksonville, people don’t really care about that team because they haven’t had much success, but I think he should probably play sooner rather than later.”
I respect his QB acumen, seems like anything I've ever heard him say about the position is spot on.