I came to D.C. for a conference and my wife accompanied me for a long 3 day weekend. This place is at an incredible location with easy access to numerous restaurants and venues. You'll enjoy getting quickly to Metro Station which beats any form of transportation in my book. In terms of the room, it is only a room and much smaller than the pictures show. Most of the time, my wife and I felt cramped up though we are both petite people. The bed was amazing (memory foam and of high quality), but If you are one of those who needs to sleep in the dark then this is not the place for you. There is a lot of light coming from the outside and from the corridor which will make sleeping a challenge. So, I would advise that you to bring a "sleep mask." Also bring some earplugs because the air conditioning unit (as seen in the pics) is quite loud.
Nicole's place is in a great location and beautiful neighborhood, but I don't think that these factors merit that I give it a 5 out of 5 stars. Currently, I am staying at another Airbnd in Arlington, obviously away from D.C. though closer to my conference where for the same price I' m getting far greater value with amenities worthy of 5 out of 5 stars.