This accommodation option was great. The apartment is easy to find (and hosts provided very clear instructions). It is easy to access from the city, and was found clean and tidy. The stairs are (as noted) quite narrow, but easy enough to navigate with medium-sized case,. The apartment has ample space, including the bathroom. The bed was comfortable, the kitchen well supplied, and the coffee/breakfast options a nice touch, as well as the range of toiletries in provided in the bathroom.
The hosts are very communicative, and always on hand to answer questions or confirm that everything is OK - very thoughtful. They also provided a folder with some tips of nearby things etc.
The only thing to note is that because there are no blinds (small high windows), the early morning sun can be quite bright, so bring an eye-mask if you're a light sleeper!