Had heard about it for years and decided to start it up last month to kill time til' the Thousand Year Door remake, and boy am I glad I did. The world, characters and lore are so charming, well-written and designed, the soundtrack is awesome. You can tell it's a real labor of love.
A true spiritual successor to the first 2 Paper Marios, but is still unique enough to stand on it's own.
If you love the aforementioned games, or turn-based story rpgs in general, and want to support the indie developer: it is an absolute STEAL at $25. You definitely get a full game's worth of content.
Bug is friend