We just finished a 3 day/2 night cruise with Serenity. It was the highlight of our holiday to Vietnam! The staff were excellent, the facilities were great and the itinerary and food was wonderful. Lots of people seem to do the 2 nights / 1 day trip, but we are glad we had the extra day as it gave us a bit more time on the boat and the extra day was spent exploring Cat Ba island and doing some hiking. I have a 4, 7 and 10 year old and they managed the hiking. The staff were especially accommodating with my 4 year old when it came to meal times and the very limited repertoire of food he would eat. Our guides, Tay and Tinh were awesome! Thanks Serenity.