We were originally supposed to have stayed at the London Marriott Hyde Park which was scheduled to open the week before our trip to London. We had a reservation, confirmed the night prior to departure, and when we arrived at the hotel, the place was still under construction. Fortunately I had my Marriott Rewards card with a toll-free number on the back (for calls in the UK). They directed me to the London Marriott Hotel Grosvenor Square, with all luggage in tow. After about an hour, we found the place and though they didn't upgrade the room we had requested at London Marriott Hyde Park, they made our entire stay free of charge. That was awesome!
Location is very close to Oxford Street, Hyde Park, Grosvenor Square, American Embassy, and much more. The Bathroom in our room was stunningly beautfiul!









