One of the more unique experiences you can have at Cosmos is definitely the Kitchen Table. We do either a 7 or 9 course tasting menu and we go all out. The dishes we come up with are either items that are brand new and we use the guests as guinea pigs or we do dishes that are too complicated to put on the regular menu. Cosmos kitchen wasn't designed for a Kitchen Table so you are literaly in the middle of everything. We usually like to show the guests how we create some of the items that we do, and people really get in to it.
On a personal note, I like open kitchens because it serves as a reminder that we cook for people and not table numbers, the Kitchen table is our way to open up our kitchen.