I don't have a DRV unit but I do have a Fisher&Paykel single drawer dishwasher in my coach and I like it. My wife was not enamored with the idea but she likes it now as well. We lost the over space but we bake in the convection/micro and it does well.
If you can afford the loss of the space that the dishwasher occupies, and you'd like the to have one - this is a great one.
A dishwasher in an RV is a luxury for sure. For what it's worth, I use the dishwasher more than my wife does. I RV a lot alone and am not to fond of doing dishes. I also entertain a bit on the road so I do have a load of dishes to do every 2 or 3 days. Works for me :)
Jim
Link:
http://www.fisherpaykel.com/dishwashing/