There are some questions about his durability, which is the only reason he wasn't drafted in the first round in my eyes.
As a pure talent, he's as good or better than any running back in this draft except for Trent Richardson.
He's got great vision at the line of scrimmage and a great burst through the line.
The Dolphins obviously felt strongly about wanting to get him because they gave San Francisco two sixth-round picks — the one this year that they acquired from New Orleans in the Reggie Bush trade and one next year — to move up just six spots to make sure they got Miller.
Miller's addition gives the Dolphins tremendous depth at running back, almost to the point where it's overkill.
Along with Miller and Bush, the Dolphins also have 2011 second-round pick Daniel Thomas, Steve Slaton and CFL import Jerome Messam.
How to use all those backs will be Joe Philbin's job in training camp and the preseason.
But, make no mistake, Miller is a very good player, which he showed last year when he rushed for more than 1,200 year in his only season as a starter at the University of Miami.
Miller is a Miami native who also played his high school football in Miami.
"I was a Dolphins fan because it's my hometown," Miller said. "Always watching those guys on TV, Ricky Williams, Lamar Thomas, players like that. It's a great feeling just to be in the same shoes they've been in and just cherishing playing for your hometown."