We had a dishdrawer for a while, a really nice schmick integrated installation. Trouble was, the drawer was either too big for a small load or too small for a cooking night; so we ended up either washing stuff by hand or trying to stuff it full so that we didn't have to wash by hand. And we couldn't put big pots in and have room left for plates etc, or the other way around.
So the next time around we're going to get a 'regular' full-size dishwasher with a good half-load option and be done with it (probably a Bosch).
I didn't have any problems with the dishdrawer itself, it just turned out to be an awkward size.