You won't regret it. This is an awesome experience, they start around noon, Victor Goye tells you the history of the curanto and how it started in Bariloche, they set things up, and you have to come back around 2 or so to see how they take everything out already cooked. While they do that, you can go to the main streets of Colonia Suiza, take a look around the village, buy some presents, it's little by cute. The taste of the food (they serve you 5 times, with different type of meets and veggies/fruits) and the last is the best for me, the famous patagonian lamb...sooo goodd! And if you want more, you can have it!
Just remember is better to make a reservation, and also, that this takes place only sundays/wed