Definitely a sideways-thumb review. Can't give it a full endorsement since it's rather poor in spots, but at the same time I liked it enough to finish and do some extra stuff in it. Honestly, most of your enjoyment in this game will come down to how you like Carpe Fulgar's adaptation. If you liked how Recettear and Fortune Summoners read, you're in for more of the same and will have more fun with Chantelise.
The gameplay on the other hand is not so hot. Chantelise is a 3D dungeon-diving game with bland graphics, repetitive enemies, and some truly annoying audio (ugh, that low health indicator). As the game progresses, you can mix and match pick-ups for more diverse spells, but they're just kind of blah on the whole, both idea-wise and visually. Melee is also just kind of there and is incredibly simplistic.
One cool feature about the set-up of the game (go to dungeon, run through some floors and then fight boss) is that each floor has a hidden item that you can grab by completing some type of unique goal. I'd suggest just looking up the in-game hint in a guide and then figuring it out yourself rather than deal with how the game gives out clues, as you lose some of your max hp to acquire them. Some of the stuff you have to do to get the hidden treasure is pretty cool and shows a development team that cared about trying to make their game fun but just weren't up to snuff to do so.
The dungeons themselves aren't anything special, either design or art-wise. You do have to run a dungeon all the way from floor 1 to the boss floor to beat it, though after reaching a floor, you can choose to practice on it from the map, which is useful for getting ready for boss fights.
Technically, far from a great game, or even a a particularly good one for that matter, but the adaptation and looking for some of the hidden treasures did enough for me to enjoy my time with this game. I'd only fully recommend it to people that enjoyed the other adaptations Carpe Fulgur did or big-time fans of dungeon-running games.