There were 5 of us: me, my friend, my teenage daughter, and my friend's teenage daughter and son. While it was snug with the 5 of us (one teenager using the sofa bed), it was absolutely fine, and the two bathrooms were a big help. The communication with Maria was very good both before and during the trip, and she was very helpful.
The apartment was reasonably well equipped (although might benefit from a bit more cutlery, bowls, and plates, etc.) and there is salt, oil, a bit of coffee, etc. There was a half drank bottle of coke in the fridge, which was a bit odd. A pint of milk would have been very welcome as we arrived late at night.
The apartment is very well located. There are two supermarkets within minutes, and it is in walking distances of most of the key areas. We walked everywhere - doing about 25,000 steps a day - and visiting many of the sites. This is definitely a bit attraction of the apartment.
We would definitely stay again.