Been playing it this weekend and am enjoying it a lot. Never played the DS version, so I can't comment on the differences.
With Chocobo Dungeon as the last roguelike I played for the Wii, this feels like a faster-paced (because the process of moving through a dungeon features a lot less pauses) that is a bit easier with your allies by your side. It wasn't until the fourth dungeon that I died, lost my items and some XP, and had to go grind a bit so I could get through more easily.
For GFW Radio fans, you'll be able to duel-wield Cudgels during your first dungeon.