The first negative pointer is that it's pure blue, making it slightly more difficult to put in a multicolour deck, but it's not as bad as say Reiver Demon for coloured mana symbols, so it can be done. However, this card is more than likely going into a Wizard tribal, so it more than likely won't matter. The second negative for this is that it IS specific to enchantments and artifacts. It's good for when you want to save that Boomerang for something else, but otherwise it might hamper your plans.
Pros: Enchantment bounce in blue and it's a Wizard
Cons: Hard to splash, targeted bounce