We had a fantastic stay at Hsiu's. It is in an excellent location and we walked almost everywhere around downtown Seattle. The bed was incredibly comfortable with lovely bed linen and we slept well all week. It was also very well equipped with plenty of towels which is not usually the case in airbnbs. The bathroom was well-stocked with shampoo, conditioner, shower gel, and a hairdryer. (And toilet paper!- which again, is not often the case in an airbnb. )
We were very impressed with the cleanliness of the apartment. The kitchen had a coffee machine, electric kettle and was well stocked with flatware and crockery. It was great to have the washer and dryer within the apartment so that we could do laundry throughout our stay. The only downside was that the sofa was not very comfy, so it was hard to relax when watching TV!
We didn't use the pool or gym in the building, so can't comment on that.