We had a peaceful, comfortable stay at Kristina's. Foam mattress was good (We have one at home. If you run hot, bring cool clothing as they heat quickly). She had coffee, creamer, and snacks (thank you!) there for us. It was a 3 block walk into town. Super clean and safe.
I would stay there in the winter, fall, or spring, but less likely in the summer unless I knew the weather forecast. There is only a wall AC unit in the living room, and summers have been hot these past years.
If you are working remotely (which I was for 2 days), it might not be the best set-up. The stool s at the hightop kitchen table aren't ideal for long hours. But if you lounge on a couch while working, you'll be fine! :)
We did hear the downstairs and next doors neighbors once in a while, but very muffled. We always bring a white noise machine for sleeping, and heard nothing with that on.