The best!
Visiting Washington DC with my 17 year old son, I wondered where to stay, I chose here and the hotel has spoilt me (us) for the future. It was wonderful. From opening the doors and walking in, to the delightful and extremely comfortable room, to the superb restaurant, to the brilliant staff, I can't possibly find fault. As everyone else said it's in a brilliant location, how wonderful to see the White House so close. Its also close to everywhere else you could wish to visit. My son is a picky eater yet the dining staff made great suggestions to him and he ate well all the time. 
We had such a good time and I've no doubt we'll be going again. I'd thoroughly recommend tis hotel. Its very special and long may it stay like this.