The appartment was great and our stay there was perfect.
The communication with the hosts was very good, beforehand and the day of our arrival. Andrés even waited over half an hour for us because we were late the day of our check-in.
The parking situation was horrible as already mentioned by the hosts and several other guests in the comments, but with Andrés help we knew where to look and after circling about 20-30 min each day, we always found a parking space.
We stayed with four people and the appartment was definitely big enough for us. The appartment was very clean and everything was there as indicated, coffee maker, oil and vinegar, herbs, soap, toilet paper, towels, sheets etc. It lies very very close to the old town, max. 10 Min walking, which was perfect for us. There are supermarkets, bakeries, shops, restaurants, bars, banks, pharmacy etc. in the immediate area. Of course, when you open the windows at night, you hear the people on the streets and the cars and motorcycles. But that's just how it is in a big city and it did not bother us much. The appartment doesn't get very hot (at least in May) but even if you feel hot, you can turn on the aircondition.
So all in all, the appartment and it's location is great and the hosts are very nice. I can recommend a stay there to everyone with 5 stars :)