This is a hard listing to review. Nate was a nice guy and flexible, and on one hand, the location (generally) and value are very good. The proximity of this AirBNB to a lot of great things in Seattle is a real benefit. Add to that the free parking and the ped bridge to Elliot Bay Park. Also, the price is pretty eye-opening for a listing this size and if value is your primary focus you'll likely be fairly happy. But, the price is reflected in the space itself.
First off, I think the listing could use some updated photos; as have others have said it is quite a bit darker (and even dingier) than the photos represent. There are also some differences between what is photographed and what is in the unit; there was no sectional couch when we stayed and one of the beds was entirely different than what was pictured.
Additionally, the listing itself could use improvements and care. There were a few outlets that did not work, one of the bedroom doors was slightly damaged, and there was a musty smell (I guess this can be expected with a "basement"/garden-level unit). The specific location was near a fairly busy road, so you should also expect some noise. Others have also said this, but the 2nd bathroom was virtually unusable for our group (everyone was at least 5'9"). As a whole it just wasn't all that comfortable even though it is a big (square footage-wise); it could do a lot more with the space.
At the end of the day, if you are looking for value and a place to stay for a day or two; I think this works. But if you are staying for a longer time or have a larger group you may be a bit uncomfortable.