Not good. I found it to be a cold impersonal tourist trap with no atmosphere and pretty inattentive staff. It took the joy out of our night out and I felt about as welcome as covid. I would not go back under any circumstances.

Update: I have a response below and will call over the weekend if possible or by Monday at the latest.

Update: I just tried to call. Phone rang for three minutes and then I was cut off. Left a message. Am not calling back. But if it assists, here are some detailed suggestions: Have staff acknowledge someone waiting at the bar; make sure bar staff know who is next; if there are several people waiting and bar staff are not serving, they should step in; smiles and talking to a customer show the customer that they are valued and not someone who is stopping them from going home; listen to the order - get the size of product right and don't forget part of the order altogether; seating and ambience of a good standard of comfort encourages people to stay and spend more - the open area downstairs scores lowly in this respect in my view and, finally, remember that you are charging a lot of money for your product that is cheaper in equally prestigious parts of London (the City, Westminster, St Pauls, Knightsbridge and Borough Market/the South Bank) and Londoners know that.

Update/Reply: Thanks PJ, much appreciated.