We stayed at Dan's place over our kids' spring break. We loved how clean the house was, and little things like soap in the bathroom and kitchen (we brought our own but didn't need it!) and use of washer/dryer. Our kids all slept in the second bedroom. We brought a little mattress for our daughter, but there was also one in the closet along with 2 twin beds in that space. It was tight, but they loved being all together for a few days. The area is safe, and we easily walked to the Lincoln Memorial, White House and all over. We utilized the metro some as well. Location-wise this spot is very convenient. We have 3 kids ages 6-11 and we kind of wore them out, but the walking was even doable for them. For parking, we utilized street parking on Sunday (free) and then used the Watergate Hotel and parked in front of the Saudi Arabian embassy some, which was just a block away. Seemed to be consistently available over there.
If you have a family, this is a great spot with the flexibility of a kitchen, full size fridge etc. that you wouldn't get in a hotel. We highly recommend it!! Because of the location near George Washington University and Georgetown there are lots of food options and we were thankful for a nice, convenient place to call home base for a few days!!