Great location, weak infrastructure (water heater, electricity).
This is a very nice apartment in a fantastic location from which we could reach many sights on foot. It is bigger than it looks in the pictures - even with the sofa bed pulled out, there was ample room for three people. So that was fantastic.
The only negatives were the weak infrastructure. The water heater did not work consistently and most of our showers were freezing cold. There were no instructions posted although this is apparently a common problem, and we had a long, aggravating message exchange to try to fix the issue. Among other things, there's a switch by the water heater that looks like a light switch, which according to the host, gets turned off accidentally all the time. Why not mark it clearly then? But even with it switched on and the instructions followed carefully, we did not get hot water consistently which was unpleasant.
The stove is an older gas model that you have to light with a match or lighter. It would be nice if long matches or a working clicker were provided as it's not nice to light these with a lighter with your fingers close to the flames.
There were two different types of socket in the apartment - some 2 pronged, some 3 pronged, and even with our universal adapter, we could only get two of the sockets in the apartment to work. There are adapters provided but those also did not work in the other sockets.
Check in was easy with the lockbox system and instructions for that were detailed.
All in all, the apartment is worth considering due to the location and price. We loved the cafe around the corner and slept comfortably at night. You should just be aware of the inconveniences of an older building if/when you book.