Not too bad
The DP-2 works well with my Roland FA-08 keyboard. I question though how well it's going to last since the entire unit is made out of plastic. Logic dictates that if your going to manufacture something that's going to spend it's life getting stepped on, that it should be made out of something more durable.
I guess these units are cost effective enough to replace if they break but I would gladly pay twice the price to have a housing made out of aluminum. All in all, this unit isn't too bad but it could be made better.
However I would buy it again since it works and isn't very expensive to replace.