It feels like a game which attempted to take advantage of Wii controls, and in doing so the production time went past and they had to release it. It's very shallow.
The game itself works. The game is on rail and story advances linearly, with monsters popping up here and there. Slashing is fun and especially if you like the world of Dragon Quest and its monsters, you will likely cry in joy seeing the monsters move around with vigor. There is something beautiful about that. The world also feels cosy and being in the middle of it is enjoyable.
The trouble is, that's where it stops. It's too much of an arcade game considering it's Dragon Quest.
It being a "Dragon Quest" franchise might draw you in, but it lacks depth, so don't expect too much. I think very young kids might enjoy it as the slashing in battles is fun and Wii remove is very functional, but that alone doesn't have enough appeal to hold you for long enough if you are a mature player. Also the game is pretty short - I spent only around 9 to 10 hours completing it.
Overall, I'm giving this 4 stars because I've read a lot about what devs went through to invent this for Wii and how much effort they made to program it. It is a good arcade game in its own right and it does what it says on the tin. It's just a shame that they ruthlessly slapped the "dragon quest" brand on it. Not only it's misleading, it dilutes the prestigious "Dragon Quest" brand. If I didn't know about the development process, I would likely have given it 3 stars, so bear that in mind - I'm rating this in context.
The battle engine is good, so I'm hoping that they will keep it and reuse the code to make a more full scale adventure game with deep story. Nice try devs, try again!