The apartment is beautiful and looks exactly as the pictures show. It's very stylish, comfortable and modern. The neighbourhood is perfectly located. The White House and National Mall are a 20 minute walk and Georgetown is less than 10 minutes walk. Mark's instructions were really easy to follow.
Things to note: there's no access to the apartment before 4pm. We left our bags with the salon downstairs for $5 per bag as we arrived early. But they were closing before 4 so we had to collect our bags again.
We were travelling with a 1 year old. The apartment really is fantastic but not ideal for a toddler who wants to run around as there are so many nice things she wanted to grab hold of!
Access requires climbing a set of stairs into the apartment block which was tricky with a stroller.

Overall a fantastic apartment and would recommend to anyone travelling to DC without small children.