Last October/November 6 of us did the full 8 day trip on The Amazon Manatee Explorer out of Coca. It was teriffic. Two very knowledgable, fluent English speaking guides; great meals; friendly crew; I can't speak too highly of the experience. Two of us have mobility issues and everyone was very patient and helpful in allowing us to see and do as much as we could. One of the advantages of being on the boat was sitting in comfort on the deck, with, maybe, a beer in hand cruising along the Napo River. Because the boat was moving through the day we would go out on our excursions and come back to the boat in its new positon. This way we travelled from all the way to the border with Peru. I highly recommend this trip.