We enjoyed our stay at Luis's place. Several things went wrong during our stay, but Luis was relatively quick to remedy the problems. First for foremost, upon arrival we were checked into the wrong apartment, another apartment Luis manages in the same building. This caused both confusion and stress for the first 1-2 hours, as we contemplated a formal complaint. But before we reported the problem, Luis realized the mistake and fixed the problem. On Day 2, I let Luis know that the shower was not hot, and also that the sink and tub were not draining. Both of these were fixed by the end of the day. Finally, this caused a big leak in the sink, which was remedied on Day 3. As I said, all the problems were remedied rather quickly...but none of the problems should have occurred to begin with.
As for the apartment itself, it is in a good location very walkable to many great areas. It's two stories up from the street, and we didn't notice much late night noise (even on a Friday night). You can expect a washing machine and clothes line outside, as well as space heaters for cold nights.
All in all, we were comfortable and happy with the apartment, but the various problems did cause unnecessary stress during 48 hours of our vacation.