We stayed at the Residence Inn National Harbor in February for a convention. It was wonderful. We had a one king bed room that was large and well laid out. Even the sofa bed was really comfortable (which was a nice surprise because many times they aren't). The wonderful staff was able to check us in early and made sure that we had extra bedding and even gave us an extra comforter to make the sofa bed even more comfy. Having the refrigerator for leftovers and snacks was very handy.
The breakfast was a hot breakfast (eggs, biscuits and gravy, potatoes, etc.) and it was a nice surprise and delicious. Perfect way to start the day!
This is a wonderful property and I will definitely stay there again when I am in National Harbor.