Ann's location near Seattle is excellent. Finding it at the start was a little difficult, but instruction were provided and it was easy to find every time after that (e.g. no confusing pathways). The place was incredibly clean upon arrival and we had pretty much everything we needed.
You are about 30 minutes by bus from Seattle, but the surrounding area is worth exploring on its own. A walk by the river, near the bridge, the Fremont Troll isn't too far away, etc. If you need groceries there is a small area right nearby with a couple of pleasant restaurants.
Ann is a super communicative host and everything you need is laid out from the start. If I had any questions, I realized I could check the provided information first and always found the answer.