I own it.
It's cute, and fun. A little wonky, and has some replay value if you want after you've beaten the game.
You divide your time between managing the shop (buying things to sell to the populace, arranging them based on some simple market data, haggling) and going out for vaguely top-down action dungeoneering to get cooler stuff to sell.
The gameplay itself is decent (if a little repetitive at times), and the art direction and characterization are cute and engaging in that cuteness. You'll probably recognize a few cute and/or magical girl anime tropes as you go along. Oh, and losing isn't that big a deal; it's a hard game at times, but it doesn't punish you as severely as it could.