Just stayed there for a week to check out the Royal Wedding festivities. Stayed there on points and we were originally upgraded to a regular suite which was large but a bit dated and then subsequently upgraded to an executive suite overlooking Green Park. The executive suite is definitely the way to go if at all possible since those have been fully re-modeled and are fantastic. The hotel was also in the process of re-modeling many rooms while we were there - - but definitely get the executive suite, if possible. As they are re-modeling, the room you get may be hit or miss but will be clean and comfortable... especially in June.