My wife and I took advantage of a deal from DL to go to LGW for the weekend. What we'd really like to know about is the Dome. Is it interesting? How long are the lines? Are some times better than others? Is it worth it?

Any help from any of you who have been there is gratefully appreciated.

BTW, does anybody know if Sabotino's, directly south of Kensington Palace ( I can't find the bloody map to name the street) is open on Sundays?