I've got one. Seems easy enough to clean:
Fill the tub to the first vent line with water dish soap, run it though the dishwasher once in a while for a deeper clean.
Really useful, as I get better results /w less effort for a number of things that I used to pan fry, faster than an oven and equivalent results for some foods, and just better than the oven for others.
I do wish that mine were less bulky, as the outer casing has a rather large footprint. Mostly got it because it was on sale, as opposed to researching a specific one.
I've done a variety of vegetables, breads, meats, french fries, etc.