Located in Mayfair in the heart of London, it's an...

Located in Mayfair in the heart of London, it's an expensive and exclusive restaurant especialised in seafood and Dover sole as the star dish.
My dover sole was delicious, really nice and well done. My squid salad disappointing but that's my opinion not a fact.
Service is good buy not excellent.
Now, the lighting makes almost impossible to read the menu, especially with that tiny printing and the restaurant is too loud. The noise is not that of an upscale venue. It's not pleasant having to raise the voice to be heard.
So, with the plus and cons is your choice now. If you don't mind overspending in a meal, go ahead and visit it. For me, it's fine but will not repeat any time soon.