Kate's place might feel small to some people but for me, it was a great size and I absolutely loved it! Modern designs in the place sold it for me and it made me feel pretty comfortable staying for the week. All the towels and bathroom essentials that she provided was really nice too to make my travels easier.
The single unit AC is definitely sufficient when it comes to cooling the whole place down considering the size of the place. Even with the door to the bedroom closed, the bedroom will still be cooled, it'll just take a longer time. Worse case scenario, you can leave the door open and it'll cool the whole place nicely.
The bedroom and bathroom will feel a little tight in terms of height for people above a certain height. Think tiny house style, I'm 5'9 and I can easily touch the ceiling with my arms extended in those rooms, so it'll be something to look out for if you're really tall.
Other than the two things I mentioned above, I really have no quarrels with this place. Everything else about this place from location, design, and hospitality provided by Kate is all perfect for me.
Kate also mentioned that, in the future, there's an addition of a 2 bedroom space next to this that'll be available for rent and I don't doubt that it'll also be a great airbnb choice as well.