We had a Rockwood Tent Trailer back in the early 1990's. We loved it and did not have any problems, but then again, it was a pop trailer without slides (except for beds) and no black tank.
You can also check out the Rockwood/Forest River Forums
. It looks like the typical current day issues on RV's occur also with the Rockwood. Good luck with what you wind up buying. Happy shopping and let us know what you wind up doing