The location of the apartment is absolutely perfect. In two minutes you can reach the Plaza Major and a great food market. The city center and a few very lovely restaurants are just in short walking distance.
The apartment is very well equipped and luckily has a AC as well, which was perfect for us, since it was 38 degrees while we stayed in Madrid.
Check in and check out is quite easy, since you have the option to get the key (and drop the off as well) at the Segway shop, which is located just around the corner.
We had a lovely time at this place and highly recommend it for your next visit in Madrid!