The check in/ out process went smoothly and also communication with the host. We stayed for several nights and for each time we needed something, the host answered within few minutes.
The flat is great, very quiet and located perfectly- walking distance from major train station/ metro and right in the centre of Madrid.
There are convenient stores and supermarkets on the same block, so any need can be found with no problem.
We were also impressed with the flat - it was very well maintained and clean.