Service matches the food and as you would expect with a 2 star restaurant, your every need is catered to. It is a restaurant to be pampered in. Meanwhile, the wine list is not a list, it's a book and is seriously impressive. The downside however to them carrying so much choice is the applied mark up and drinking here is an expensive affair: our pre-lunch glass of champagne was €25 per glass and you should expect to pay €100+ for whatever bottle of wine you eventually settle for. Admittedly, it's probably in line with restaurants/hotels at this level.
Overall, we were impressed by Restaurant Patrick Guilbaud and it's clear why they are so well regarded. They aim for the very best in all areas and succeed, making it very much a world class restaurant.