Fantastic location just a block south of Logan Circle. Short walk to just about everything a visitor might want (Mall and Museums, Capitol Hill, Convention Center, Capital One Arena, GWU, Georgetown, Adams Morgan, U Street corridor, Howard, etc.) and a safe six block walk from the Metro. Mind-numbing number of coffee shops and restaurants within a flew blocks as well as THE best Whole Foods I've visited in the US (Yes, even better than Chicago, if you can believe it). Matt provides you with a near-encyclopedia of tips on things to do and places to eat, drink and be merry/gay but I have to mention Estadio tapas on 14th Street at which I had one of the best meals of my life.
The unit itself is a VERY nice and fairly new "English basement" unit a couple of steps down from the sidewalk with a private entrance. There's NO street noise whatsoever for you insomniacs. The unit is cozy with a well-equipped kitchen and great technology (awesome TV). Both beds were comfortable, the hot water and water pressure in the shower were fantastic, and the unit was among the cleanest I've ever rented.
Communication with Matt was instantaneous from the get-go. Check-in was extremely efficient with a great keypad system and even though Matt was out of the country, he checked in several times to make sure everything was okay. He also very generously allowed us to keep our luggage in the unit during the changeover/cleaning time as our flight wasn't until the evening.
If you're reading this and his place is available, book it NOW - don't wait. You won't be sorry.