I went to the japanese-brasilian restaurant – Sushi Samba. No way to remember anything about the food, so I assume that quality was lower than the average and costs (way) higher than average. As it usually happens in London.
But views are unquestionably beautiful. Views of the city and the river make the difference, and bring the price the to the right level. A nice cocktail-bar completes the experience. Just take a look at the photos.