We had a similar experience and signed up for a painting/pottery excursion. Little did I know that it was a lot of waiting for the right tour bus. Then, everyone ended up at the Good Hope Estate. And, yes, it was very disappointing. We were hoping for something filled with rich history. We waited around for 30 mins until they showed our little group to a little pottery area across from where they dropped us off. Then, waited again after an accumulated 1.5 hours and hundreds of dollars, we sat at a table with paint from what looks like what one would by for painting by numbers that lasted 15 mins. Then, we had a chance to do the spinning on the pottery wheel. Sadly, there was a child who kept throwing temper tantrums and was not allowing other children time for the pottery wheel. We had lunch in the same area as everyone who signed up for other excursions. I did not feel that it was personalized or worth the cost of the excursion. Afterwards, we purchased a Jamaica shirt, shorts, bag of coffee beans, icecream, and went back to pick up our cups. BTW, we painted pottery that was already pre-baked so none was made by any cruise excursion participants. We rushed back on the bus heading back to the ship and was truly disappointed. With that, once we arrived back, like myself, other families were upset over this stop. When I boarded the ship, I requested for a refund and wrote out a 2.5 page comment/complaint form.
I forgot the exact name of the excursion, but I recommend another type of excursion instead of this one.