i own two -
These fermenting pots are great pieces of stoneware, and help immensely with any anaerobic fermentation you might do. I use them for food, but you could use them for the secondary ferment of alcohol, technically, I guess.
At $77 for a complete 5l set with weights, this is a great price!
4 stars, because the opening of the fermenting pot is rather small for the total width of the fermenting crock, and it makes getting the weights in and out a bit of a chore...but you only have to do it once per batch if you transfer your finished ferment to a separate storage vessel like I do.