This was truly a gem.
We (couple) stayed here for 30 days(!) upon relocating from another country - it was everything we could ask for: Large and comfortable rooms (so many other listings are so small!), fully equipped kitchen with all of the appliances, and very central location for site seeing or apartment hunting!...
A few things to consider:
Cracking/metalic noise - yes, you can definitely hear "the building". Your brain will eventually filter it out after a few days but if a few days is all you have and you are a light sleeper, maybe consider some ear plugs. The plus side is you get a well-heated apartment that is never too hot or to cold (we stayed during the historic snow storm of Feb 19).
The Location is fantastic, on the border between Capitol Hill, First Hill and Downtown. Quite but not sedentary (no traffic noise, and only occasional "street shout").
Note that surrounding streets are very steep and you have to be fit to walk out or back - If you're going to walk a lot just keep that in mind, it's true for many areas in Seattle that are borders between hills like this.