We spent three nights/four days here, brought three teenage kids for a D.C. vacation. The space was perfect, enough room for all five to sleep comfortably and move around with no problem. I was able to cook breakfast each morning (pancakes, eggs, ham) using the hot plate and fully stocked cabinets, and we used the grill to cook a full dinner one evening. The Metro cards were a huge asset, we added money to them as we needed to and replaced a card that one of the kids lost. We drove the 2 miles to the Rhode Island Metro station each day, parked in the garage for $4.95 per day, and used the Metro to go back and forth to the city and sites. I also used Rebecca's recommendation for fresh local coffee at Zeke's Coffee each morning for myself (ah-mazing!).
While they try to not rent the upper space at the same time as the lower space, we had two mornings with upstairs renters. They woke us between 7-8am (teenagers hate that), and it sounded like they had 12 kids running around. We needed to get up and get going with our day anyway, but if you like (or need) to sleep late, make sure you let the owners know ahead of time.
We had a great trip, five stars all the way!