A very very good experience and must do thing when you are in Ha Noi.
We decided to go with La Paci Cruise just a day in advance and turned out to be a good choice. The boat was in good shape and the deck ws quite spacious - best thing was that people on board were limited and hence had a good relaxing time. Our guide Kevin ensured everything was perfect with good stories and overseeing all the activities.
Kayaking and the cave tour were the best parts of the trip.
Suggest to get on board of this as and when you are here.