So, first of all, if you're looking for some place to stay to spend a day or two at Lake Washington, this place is in a great location. A short walk to the beach, walkable to shops and restaurants. And the owners did leave a chocolate bar for us to enjoy. You can't see the water from the place, however, and except for two very small chairs by the front door, there's no place to enjoy the outside.
That said, be aware that this is an underground apartment, part of which used to be a garage. While adequate, it does seem very dark, even with all the lights on. And it is small. Adequate for two adults and maybe a child if you bring a portable crib. There is a living room with a sofa, a bedroom with a closet (but no light in the closet), a small kitchen and eating area, and a very small bathroom. I'm only 5'5", but I had to duck down to wash my hair in the shower.
We were always aware of the owners upstairs -- their music, their footsteps, their dog running and occasionally barking I the house.
The bed is made European style -- with a bottom sheet but no top sheet -- just a comforter. While I am familiar with this from visiting family in Europe, I don't like it. It makes my feet cold and makes me feel that I'm crawling into a makeshift bed, like we haven't unpacked the sheets or something. My German husband thought it was fine, though. Also, there are dense feather pillows on the bed which squish like pancakes when you lay your head on them. I hated them. Give me a good foam pillow any day. (again, my husband thought they were fine).
Altogether, the location is pretty good, but the apartment was kind of depressingly dark and small, and although the owners tried to make it homey and provide the necessities --we wouldn't stay again.