We were here with two kids (4 months and 2,5 years old) and we felt very confortable.
It is not superbig but definitely enough. Very good use of the space.
Very good location, some noise in the nights from the bar behind, but it didn't bother us that much.
The beds are great.
It has a lift (much appreciated and rare in the center)
Fully equiped, though not amazing for pasionate cookers.
We still don't understand how, but we were not cold at all and there are no heaters (only airco). When we saw it we thought we had to warm up the space with the airco, but it was not necesary at all, and it was definitely cold outside. It must be very well isolated I guess (+the double window)
The service, help and comunication was supergood and honest, big value for us ... we had to book two times in the same holydays in Madrid and we repeated.