Never used disc brakes on a road bike before. I have BB7's on one of my MTB's and they work way better than any other brakes I've ever had on an MTB. They work so good I have to be careful when I ride the road bike or the other MTB because I have to grip the brakes so much harder to stop. The other MTB has v-brakes on it.

The disc brakes do make noise now an then but it's not a big issue.

Like others have said, you're setup must be incorrect or the road version just isn't as effective.