I love this hotel... The only thing I would change is: they really should offer free wireless. They do have wireless at tea.
The things I love about the Cavendish:
Bathroom.... Love love love the soaking tub and separate shower with decent water pressure.
Loved the spa robes and slippers
Love the Nespresso and cookies ( biscuits)
Loved their tea service
Loved the breakfast, especially the endless salmon on the buffet
Loved our view , I think we were on the 12th floor if I remember correctly
Mattress was comfortable
Decor was lovely
I don't want to stay anywhere else