The location is excellent. You're right near a metro stop and can get anywhere around DC fairly easily from there.
I would say the space is excellent for two to three adults (of which two would have a shared bed and the other in the living room bed). We had three adults and two kids (5 & 7), which presented some challenges.
The place can be hard to find. The numbers on the units aren't very easy, but we were able to find the place within a couple minutes of Google telling us we were there. We also got lucky with a parking spot right in front of unit. I could see that being a bit of a gamble for other guests. I also didn't see any parking other than street parking, so be prepared to parallel park as well. It also took us a minute to find the zone sign to make sure we were parking in the right spot as well.
I had two main issues. The AC is a window unit mounted in the bathroom. I don't think there's much else that can be done about it given the layout and when the house was built, but it caused some issues. It meant the master bedroom did not receive air conditioning with the door the closed. It also meant the rest of the house did not receive air conditioning when the bathroom door was closed. I think at a different time of year (we were there in the middle of summer), this would've not been a issue. When everything was open, the AC decently kept up with the temperature and we were mostly comfortable.
The other issue was cleanliness. The exposed/open areas were neat and clean. We shifted one of the futons and found several used bandages and gauze. I expect this was simply missed during cleaning and is very easily resolved, but it created some concern about the overall state of the place.
Some other things to note:
While there are two futons, I only consider one to be reasonable to sleep on. The one I slept on had a metal bar through the center of it. Some pillows or covers may change that. Unfortunately, I went to pull out the foam fold out mattresses underneath the other futon and saw enough stains to abandon the idea. Again, some blankets and pillows over it and it may have been well enough.
I was able to hear some people upstairs through the flooring. This was very, very minor and did not occur during sleeping hours. I didn't check the exact time, but I remember 9pm to 9am being quiet. Honestly, I was more concerned about the noise the girls we brought were making.
If I had to do the trip over again, I'd probably pick a larger place near the metro, as the metro made it very easy to get anywhere. If I were to do a trip with just 2-3 adults, I think the place works well and the location is excellent.