We enjoyed our stay very much. The location was terrific - walking distance to many restaurants, little shops, bookstores, etc. It is a busy street, so the busy street noise was expected. We didn't need it, but there was a noise machine in the bedroom for more sound-sensitive guests.
Check-in and check-out were very easy. The apartment was just as advertised. It is small, but we comfortably seated two quests for pre-dinner wine and snacks. The kitchen table seats two. The bed was extremely comfortable (although four pillows instead of just two would have been even nicer). The kitchen was tiny, but there was a great refrigerator, a small cooktop, and a microwave which made it easy to have breakfast before we did our touristy things for the day. The bathroom was phenomenal - great shower with super water pressure. We had a minor issue with the sink faucet, but the manager/owner responded to our concern immediately and had it fixed within 24 hours. The sofa was comfy and placed for easy TV watching. Fellow guests in the other units were friendly and quiet.
We would definitely return should we find ourselves in DC again.