I find it a bit difficult to rate this tour. We mostly enjoyed it. Our guide was friendly and informative. The treehouse setting for the chocolate tasting part of the tour was beautiful, and it was really fun (especially for my 7 year old) to be able to try 10 different chocolates. It was neat to see the different varieties of cacao pods growing on the trees, and to see how they've planted other trees to offer natural windbreaks and canopy.
Learning about the story of how this particular cacao farm came into being was almost more fascinating than learning about how they grow and process cacao. This was partly because I've taken a chocolate factory tour before where they talked about how chocolate was made, and not much more information was offered on this tour. We got to see the trees and the discarded harvested pods, and to look at small jars of the different stages of processing (beans, nibs, etc), but didn't actually see the fermentation or other steps, or anything in the chocolate factory itself. If you've never done a chocolate tour before, it probably would be more informative to you. Reading between the lines on what drove the decisions made in the foundation of this farm was ... interesting.
I haven't done the chocolate tasting only tour, so I don't know how the information you get compares to what you learn on the farm tour. If they do talk about the process of making chocolate during the tasting, then I'm not entirely sure I think the farm tour is worth the extra money, unless you really like to see the growing plants (and the treehouse definitely had a nicer view/setting for the tasting than the rooftop patio, which was nice). And a note of caution on buying chocolates in the store - their pricing works out to something like $1 per 5g of chocolate. The chocolate bars, which are on a shelf behind the cashier and not out where you can pick them up, are less than 1 oz each and sell for $6-8. If we had realized that before we bought them, we probably wouldn't have (they also didn't have bars of our favorite flavor from the tasting, guava). To be fair, the story of what led the owner to build a chocolate factory and not just as cacao farm should have warned us that the prices would be really high.
All this is not to say I wouldn't recommend the tour, but you should decide for yourself what you're looking for and what it's worth to you.