Nice hotel in a nice neighborhood. Been there in early Nov for a conference, stayed 4 days. Reasonably clean and reasonably kept. Cleaning in room - every day. Staff is helpful without exceptions. No elevator, but I don't care about that, although if you have a heavy bag you will be inconvinienced.
Wireless is fine. Food (breakfast) is awful. I have wondered in several different hotels around the world how they manage to serve old cakes every day.
So for a single person coming to WDC this is fine. Really suitable. For a family, esp with kids - no good.

I with our other team members were on business trip to WDC in the month of May 2009. This hotel was booked after internet search and we chose this hotel because of it being on the K-Street. Our place of work were also in the K-street.. We found the hotel satisfactory. The metro stn. DuPont circle was in vicinity and hence it was a great advantage as it helped me/us save many dollars. Yes, the upkeep of the hotel was good.It provides complimentary breakfast but with limited choice. it also provides a Micro-wave oven in the lobby..Besides this it also provided us free internet browsing facility.

The attraction was an Spanish concierge who was a die hard fan of Indian Superstar Amitabh Bachchan. He entertained us in the alien territory like anything. His way of mimicry was worth watching. However, all others were not equally good.

I can say it was a good stay.

Stayed for 2 nights in January to bring our daughter for her winter program in DC. We rented a car for her suitcases, but very soon found out parking was costly and rare around there. Luckily , this hotel was a 10 minute walk from the subway and we were able to return the car the same day. Our double bed room was small but enough for us , clean, bathroom was clean. However everything was old and almost threadbare. Old and smelled moldy. Room temperature was good, though. Breakfast was served in a back room and consisted of pre-packaged items, bagels, muffin, cereal and standard coffee and juice. Its ok and appreciated since the alternative is walking out for 10-15minutes in the cold to go for morning coffee. This hotel is adequate for a stay in DC where there is so much to see and visit, one just comes back to hotel to shower and sleep.

Washington DC hotels ARE expensive. Windsor Inn is at the cheaper end of the scale. With this in mind the WIndsor is an acceptable place to stay: great location, fine breakfast, friendly and helpful staff. But beware, it is not 'luxurious', it does not exude European luxury, although the website claims it does. It is more like a two star European pension. You may strike lucky and and get an upstairs room; you may luck out and get a 'garden' room (located in a rancid basement lacking ventilation). Three stars for an upstairs room, but barely two stars for a basement room.