I just got my premium, I played a fair amount of games on the pro.

I may be a bit biased since I bought one but I think the upgrade is definitely worth it.

The raptor pit alone changes the game quite a bit, people can say what they want about the t-rex but it is awesome, it really adds to the "big moment" feel, not just the shots but the moving around and roaring during the game.

The pro is absolutely a great value in itself, still a great shooting pin but the "toys" on this one are pretty cool upgrades, I don't feel bad about spending the extra $ at all.

Haha that's kind of it in a nutshell.

100% agree the premium art work is gorgeous and is miles ahead of the pro and LE.

I was dead set on an LE until I saw the artwork differences, that was what made the decision for me.
I'm not wild about the green powder, and I couldn't stand the derpy looking t-rex on the front.