I put our slimline one on every night before going to bed. Its doing the dishes for me now while I do mumsnet/ravelry.
then I empty it while i wait for the kettle to boil in the morning.
We have such a small kitchen I don't actually have to move to empty it - just sort of lean across to cupboards. A slimline was our only option due to space and just takes a day's stuff. But I think i'd get a slimline again in a bigger kitchen - my friend has a full sized one, two adults and one child, they only put theirs on every 3-4 days when its full. Which I think is bleururrururugghhghghg.
BUT after each meal she runs a washing up bowl full of hot water and washes pans and knives saying 'we use these all the time', yet only puts the dishwasher on twice a week because they are on a water meter.... eh????
And they went out and spent a fortune on new crockery because they kept running out of clean stuff before the dishwasher was full.
Slimline every time for me!