Il look in a bit at the brand Iv got but in the mean time here's what I know.
I have one like you I can't fit a full size I love it!
I sits on the bunker above the washing machine next to the sink.
The inlet pipe needs plumbed in so becase they share the same pipe we can't use washing machine and dishwasher at the same time but that's really not a prob.
The waste pipe goes straight in the sink, Iv got it running just behind the tap so it isn't in the way.
It is supposed to be a 4 plate setting. But Iv found that depends on how big the plates are but I can normally get away with using it every 2nd day. I can fit in oven dishes and pans and Tupperware too.
So for example on a Monday a usual load would be 4ish plates, 2 bowl plates, 2 wine glasses, 2 cups, 1 or two juice glasses, a casserole type dish, cutlery, cooking spoons etc, few other random bits.
Anything else you want to know?