How can you not like a place that serves an authentically awesome champagne cocktail? Had my first Lanesborough here (Gran Gala, pineapple, cranberry, & champagne) and The Most Dangerous Cocktail on the Menu delivers (apple-y and vanilla-y). Swirly swirl with a cinnamon stick :-) The food was another pleasant surprise! Shared the filet mignon with a friend and it was cooked perfectly, with a really yummy veal demi-glace.
Downsides: the place was musty with a haunted British parlor look and loud, because of the live band (the band was good, though). Everything on the menu was extremely price-y. They shouldn't also charge a $5 cover with those prices.