Does getting all the panels of a Puzzle Swap puzzle do anything?

On Streetpass Mii Plaza, one of the games you can play is Puzzle Swap, where you get pieces either by paying with Play Coins, or by meeting new Miis on Street Pass.

There is a large variety of panels/puzzles, and I was wondering if there was any bonus to completing one, other than just having a nice picture in your collection.

Is there some sort of bonus here?

The only bonus is that you get to look at a pretty picture that moves in 3D. For a Nintendo fan, they are pretty neat.

With that said though I would spend my coins on the find mii games before giving your coins to the puzzles, personally having all the different hats was a more worthwhile goal to achieve compared to the randomness of the puzzles.