Not Incredible, but decent enough.
The graphics: you're not going to be playing Dragon Blade because of its graphics. Let's be honest here, the graphics here will pale in comparison to any X360 or PS3 games. Enough said.
The controls are not actually that bad, albeit a bit sensitive. I've read reviews people indicating sore wrists, but that's also because people seem to get a tad excited when swinging the wiimote. From time to time, the game may misread how you want to attack, but all in all, it is pretty good. Particularly, it has a pretty good queue memory, so if you are constantly swinging, you won't get a chance to stop anytime soon to block or roll out of the way.
This game isn't special, but it is one of the few hack & slash games on the wii. I can't say it's a must-play, but since there aren't any other games out, why not give this one a try (granted, you like the hacking and slashing)