Lynn and Mark are fantastic hosts. Close to my arrival I asked if someone would be willing to help me with my luggage up the stairs and they had someone in the apartment waiting for me to help me with that, even though I got a bit delayed from the airport. Upon my departure they were again flexible and let me keep the luggage in the apartment until I was able to move to my new place. I didn't have any issues during my stay--except one time I pulled a curtain down from its rod and they sent someone immediately to help. Another time I asked if I can get help with cleaning the apartment midway through my stay and again they were very accommodating and quickly arranged for that.
I was a single person staying and the apartment was plenty big for me. For more people, the second bedroom is a bit small so not sure how an extended stay would feel there but for short stays it is certainly fine. Also the living room can easily be sectioned off like a separate bedroom.
Natural light is one of my most important things and the apartment gets lots of light since it is at the corner of the street and an ally so even the bedrooms get a lot of light. The only drawback to that is that there is a loud dumpster truck passing through the ally just under the bedroom windows every night around 5-6 am and light sleepers might be awoken by the noise--it bothered me for some time, then I guess somehow I got used to it and was able to sleep through.
Also, the apartment has a wonderful book collection that I wish I had time to read. My work in Berkeley proved to be too far to commute by BART from the apartment location so I didn't get to enjoy the neighborhood as much, I was often tired and just looking to rest in the evenings. Also the neighborhood is full of restaurants around but I realized after two months that yelp and a random walk to a seemingly busy restaurant does not necessarily reveal the best options. So I somehow wasn't satisfied with my food experience there--I realized that only after a local friend pointed out the really good options I had never gotten to explore. Ah well, next time.
All in all, a good experience.