When planning a visit to Vietnam, is it worth including a Mekong Delta cruise or is a day trip enough?

We love the idea of a couple of nights on the water, and some of the tours are built around a Mekong Delta cruise while others just do a day visit. We’re trying to work out if the overnight cruise is worth prioritising. Was the Mekong cruise a highlight for you, or more of a nice-to-have?