I want one . I'm another person who has repeatedly read/heard that they are far more "green" than hand-washing dishes. More importantly, I am fed up with standing at the sink too, and so is DP.
I also hate the fact that the spouts of baby/ toddler cups are practically impossible to clean if you don't have a dishwasher. I spend ages on them, poke them with toothpicks etc, but they still get manky eventually and I end up chucking them. Pah.
We don't have a logical space to put it, though. Our kitchen is not too tiny, but it's just weirdly laid out and makes no sense.