We stayed in a BWI deluxe concierge room in Oct 2004 and I would definitely recommend it! Here's a little info:
Most of the concierge rooms are on I think it was the 5th floor but a few, including ours, are on the 4th floor. It seemed like a bit of a hike to the concierge lounge because of how spread out the elevators at BWI are but after a day or two we found a little stairway to use as a shortcut. Next time I would request to be on the same floor as the lounge. The concierge lounge itself was lovely but a little small but it has a very nice balcony which faces the garden area and from one side of the balcony we could see Illuminations. The food selection and service were excellent. At breakfast they had bagels, croissants, danish, muffins, cereal, fruit, juices, milk, and tea and coffee. During the day there were only snacks (chips, pretzels, goldfish), soda, and tea and coffee. And in the evening there was a selection of desserts and tea/coffee. We used the concierge most days for a quick breakfast and a few times in the evening for coffee or a sweet fix. And the staff was terrific. In fact, I contacted the concierge by email before our trip for help in getting an Illuminations cruise (after striking out 3 mornings in a row) and they came through!! They also helped make some priority seatings for us and I saw them help out other guests with transportation problems.
As or our room, it was very nice and large and had a spectacular view of the boardwalk and lake. (I think we were just above the bakery). It was not noisy and the only negative comment I would make is that it was very far to the elevators. We had the "deluxe" room with 2 queens and a pull out couch. There were 2 TVs, one near the beds and the other near the couch but the room wasn't divided in the way that the deluxe rooms at WL are so it didn't feels like a suite as much as it just felt like a very spacious hotel room.
Overall, with the help we got from the concierge staff, the money we saved on the breakfasts and snacks that we had in the lounge, and the size of the room (and it's great view) we felt that it was well worth the extra $$$.