Sheraton is a great hotel. Very convenient location with a quick access to metro/subway. Clean, spacious and soundproof rooms, wonderful breakfasts, very friendly and accommodating stuff.
The only reason I put 4 stars and not 5 is that I have to contact them afterwards about the charge - they require deposit of 100 USD per room, and after 2 days after departure it is still charged to my credit card.
Also, the swimming pool requires a swim cup, and it is quite cool water, while the hot tub was unbearably hot. So, if you experience these, go to the front desk and tell them. Inconvenience.