I'm currently on the 12th/13th dungeon right now, and I gotta say... Pandora's Tower is good. Like, "I want a sequel" good. It strips down the unnecessary padding of most Zelda games, adds some RPG-stat layering and equipment systems, and then gives you thirteen straight shots of dungeon-exploring, puzzle solving goodness.
I had heard it was the weakest of the three Rainfall Games, and I won't deny it- it is, but that doesn't mean that it's a bad game, or even a mediocre game, by any means. It has a unique flair in its visuals, its mechanics, and its individuality that I really wish we could have more of- the world that is created is a fascinating and disturbing one, but also one I would love to return to.
Pick it up if you're interested.