This apartment was just great! it was modern, clean and perfectly located! we bought a 3 day metro pass when we arrived in Madrid, but regretted it when we realized just how close everything was! We walked to all of the major sites (for us) only taking the metro 4 times... to and from the train station and to and from Retiro Park.
The 2 full bathrooms were wonderful to have. after 1.5 weeks staying at BNB's throughout Europe with 7ppl, it was a luxury!
We absolutely loved Madrid and will definitely be staying with Alex again in the future. I highly recommend it!