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So psyched about this guy.
I wouldn't trade him for Heyward (a bit overhyped) or Hanley (not enough years left), or even Upton (great, but more expensive with less years).
I'd probably trade him for Jose Bautista (mini-Bonds in a bargain 6-year deal), Mike Trout or Harper, maybe Longoria (its close).
I'm having a hard time coming up with anyone else. I don't think theres any question that Ackley is one of the top 10 most valuable properties in the game. Probably top 5.