Would I not use earplugs during sleep (like my gf) I would only give 3/5 since the walls are basically paper. But since I do use them I had no big problems during night. The rest of our experience was actually pretty ok but especially the hand towel next to the sink - which is in use for every occupant - should be changed when there is a change if guests. Over our 3 nights stay there were probably (not sure since we didn't meet every guest) 8 different people who used the same towel.
The host was great: really friendly and forthcoming! Thanks for the warm welcome and travel tips :)