I just did the Amazon on International Expeditions. Lousy lousy lousy boat!! No indoor area except the dining room so we got eaten alive by the mosquitos. No screens on doors or windows and even the cabins were full of bugs, ants, roaches, mosquitoes. If i could redo the trip I'd look at Lindblad whose boat the delfin 2 looks wonderful. We saw the Aqua and she looked grand, I wouldn't hesitate to book on that either.