Me and my friends stayed in Matt's apartment for three nights while our first stop at our tour through the eastern US. It was a great experience - not only because of this amazing city but also because of Matt's adorable and cute apartment. The check in procedure was very easy and worked without any problems. The Apartment was equipped with all we required to have a pleasant stay - especially with some goodies wie did not expected (e.g. the metro cards). Matt was a very friendly host who reacted quickly to any problems or questions.
All in all, Matt and his place are highly recommended to have some beautiful days in DC and in a nice neighbourhood.