We had an amazing time in Madrid, and it was largely thanks to Kristian! We were only there for two days, but Kristian and his girlfriend made us feel as part of the family. We went out with them and their friends twice and had a great time! Lovely people whom I am happy to call friends!
The apartment itself was comfortable, clean, and conveniently located. It was a bit noisy, but we weren't exactly looking for quiet evenings! When it came time to sleep at 2am or later, it was pretty quiet. Or I just didn't notice. I come from big cities, so noise isn't really an issue for me, but if you are sensitive to it, then you may want to stay away from the city center when it comes time to sleep.
Internet works well, and we were able to wash our clothes. Kristian was flexible with our departure time and was a great host all around.
Overall, I found the apartment, the location and the people to all be fantastic! When I go back to Madrid, I'll be writing you Kristian! And my place is open to you if you come visit me in the US!