TLDR: Adding a ceiling fan to the main bedroom and dropping some $$ on better pillows would take this place to the next level.
(The good)
What a find! This was a terrific place to rent for our last minute trip to DC. The place is beautifully decorated and great for anyone looking to stretch out and relax after seeing the sites or dealing with work events.
The house feels very upscale, modern, etc. Lots of usb plugs available in the many electrical outlets spread through out the house which was very nice. Large TV's located through out the house. (None in the bedrooms) though the upstairs living room with recliners had one, which was great for my mom who is over 70 and had a tough time with going up and down the stairs.
It was nice to have 3 bathrooms available for our family, so no one had to wait or run upstairs when they needed to use one. Having a fenced in private area was also really nice. Lots of space for cooking or entertaining, between the large open kitchen and large dining area.
This house is beautiful and staying here should be a solid experience for anyone
The owner was very friendly, had great communication after arrival, and I would gladly rent from him again.
(The not so good)
That being said, we did experience a couple of issues that I think folks should be aware of:

There is limited street parking available. The signs say that you can not park for longer than 2 hours without fine or towing, but we were able to park out front with no real issue. At the owners suggestion, we made sure to move our car at least once daily and had no issue.
However, upon arrival, I learned for an additional $40/day we could park in the back fenced in area.
We also learned about another fee, which was a $150/pet fee for our 2 dogs. My wife and I are both on the autism spectrum and travel with our dogs for our disabilities and were appreciative that the owner didn't charge us but I do think that any additional fees that owners are going to spring on people need to be in the listing (even if they are optional fees) for transparency; otherwise it really creates unnecessary frustration from the renters. Let us know what we need to pay for so we can prepare ourselves!
Lastly, while the mattresses were pretty comfortable, between the heat in the main bedroom and the flatness of the pillows, neither my wife or I got much sleep during our visit. Both bedrooms, while spacious and otherwise comfortable, are upstairs where the heat rises to, and with no fan in the main bedroom, it can be rather uncomfortable to try to sleep. (The 2nd bedroom did have a small fan).
If you're considering this rental, I suggest you book this place, just don't forget to bring your fave pillow.