Lake Atitlan is a wonderful place that deserves more than a one-day visit. But if you are in Antigua with just a one-day window, then this tour is a great choice.
We visited three villages by the lake, walked around beautiful streets, learnt about coffee production at small plantation of a local café and about cotton weaving and coloring at a local co-op, and more.
Juan was an excellent guide, knowledgeable and friendly. He gave us a choice of where to go in the villages, but also made great recommendations, so the tour struck a perfect balance between free time and fixed schedule. Strongly recommend!