My stay at Dirk & Jaq's apartment was excellent. They were super-easy to communicate with, and Dirk stayed at the apartment quite late in the evening in order to meet me after my flight was delayed, so that was very much appreciated. The apartment itself is in an excellent location, especially if you are attending something at the convention center, which a 5-minute walk (take the the steps on the corner of Hubbell and Pike--they bring you up to a Freeway Park that leads to the back of the conference center; it took me two days to figure this out!). If you are going to Pike Place Market etc., it is about a 10-15 minute walk. There's an IGA about 10-minutes walk away for groceries.
The apartment is clean and has everything you need. Aside from salt and paper and some sugar, there isn't really any food (spices, oil, etc.) there, so if you are planning to cook you might want to be aware of that. The bed is very good. The apartment is a little bit generic, and the building itself clearly has a lot of Air BNBs in it. Still, you're in downtown Seattle for half the price of the fancy hotels--what more could you want? I'd definitely stay here again.