Overall, it was a very cute place to stay in with 6 (including me) guests. One downside of the place is that there is only one bathroom, so that was tough to deal with, but I booked it knowing that.
In terms of cons, I stayed during a stretch of extremely warm weather for Seattle (highs in the 90s) and the lack of AC was quite tough. In addition, I had only booked the place for one night for me and 5 of my closest friends, and right before check-in time, they let me know that there were plumbing issues in the bathroom, supposedly caused by the prior guests. This seemed quite odd though, as they mentioned that there were four distinct issues with the plumbing (main concern was that water was leaking significantly and escaping the bathroom), and I'm not sure that prior guests could have caused that many issues, only to be discovered right at our check-in time. Though this may have just been bad timing, it really threw a wrench in our plans as we were not able to use the bathroom for a few hours which caused our plans for the rest of the night to become quite delayed. And, as people were coming in and out of the house periodically, we were not able to use the place in privacy. Holly and Matt were very communicative during this period, but I wish they would have done more, especially since we were only there for one night.