Gurumin 3D is $1.99. Just picked it up myself.
The big questipn for me is what DLC to get. I have lots 3DS physical games, would hate to be blocked out from important DLC. Heard the DLC for Fantasy Life is pretty substantial, and that there is a Fire Emblem game only available via DLC as well?
Short answer, yes. It's for Fire Emblem Fates, and it's kinda weird. In terms of story DLC, It's Birthright/Conquest, and Revelations. But wait, aren't Birthright and Conquest the main games? Yes, but this game did something that I wished Pokemon would've done; you can buy the other version as DLC. I think there are some other story DLC that are not just challenge maps that I'm forgetting. It's been a while.