5 stars….but! Stairs! Plain and simple, I was in apartment 20, 3/4th floor. I’m fit but it will get your breathing and heart rate up! Wife pointed out it’s not for you if a) you have mobility issues b) have heavy luggage c) Also…note that there is no cancellation, I didn’t and when my plans changed I was stuck a week longer than I needed. So I stayed anyway. 2x tube stations a 10 min walk. Walkers, apartment to Big Ben via Buck Palace and through 3 parks takes 1 hour and was World Class. Oh, I’m 185cm/ 98kg and the shower was very tight. Hope this helps