Stayed at the BWI Concierge in November, and loved it!
Just a few things...
We had a "phantom smell" in our room (at the very end of the hall in concierge); we told a CM, were given a humidifier, and that took care of the smell. Apparently, this smell is not uncommon.
Also, there is ALOT of walking if your room is located at the end of the hallway! The view of the fireworks and the Eiffel Tower in EPCOT is beautiful, but you have to walk quite a way to get there.
The CMs are wonderful! I had an issue with Mousekeeping taking an article of clothing from the room (overzealous Mousekeepers took it), and Steve did his best to help me find it; I didn't get the dress back, but I was given a credit to spend at any
Disney store.
Overall, a positive experience! We enjoyed it, and would stay there again.