The Mariner is MUCH smaller than the mega-ships, and queueing is hardly a problem. Signatures was a highlight - like a good expensive NY restaurant, with impeccable service and no check to wait for. The Voyager Lounge was great at the Hubbard Glacier - arrive early for a good seat. The Horizon Lounge was the place for tea and trivia [and scones with clotted cream]. I haven't been on the Navigator - leaving soon on the PG and a little concerned that it'll be too small, but I found the Mariner and the R7 that I also cruised on ideal.