Overall the flat was good, AC was great under the hot weathers in Madrid and the noise insulation did a greta job keeping the house silent.
However the check in system was a bit complicated. There’s a late check-in cost for arriving after 8pm which was not mentioned in the description…
Be aware that the kitchen does not have basic condiments such as salts sugar or oil, it would be great to have that provided. Nor any detergent pods for washing machine and dishwasher. I would suggest leave a few of those for every guests.
One more thing is that the water heater is the conventional water heater type, it is not enough for dishwashing by hand and showers for 2 person :D