This apartment can be great, or bad depending on the type of trip you are planning to take.
I went with 4 friends to go see a concert and explore the city, so the only requirements of the apartment were that it had decent beds, and was in a good location. It has those two attributes and it definitely fit all of us comfortably. The communication with the owner was super easy and when we needed additional bedding some was left for us in the unit while we were out which was extremely convenient. For a trip where you spend little time in the unit, the price is great and it works. Absolutely recommend this unit for this kind of trip.
I have to say however, that the unit has almost nothing in it. It would be difficult if you wanted to cook a proper meal or spend time relaxing in the unit as it was equipped with almost nothing inside aside from the absolute basics. Additionally, it is in a building that I think is just for tourists, and with the thin walls, you can hear everything that is happening in the units above and below you. If you are coming with a family, and want to spend time relaxing with peace and quiet, I can't recommend this unit for that trip.