It wasn’t too involved to construct. I’ve never heard of them.
I’m not really sold on the benefit(s) of earthbox now. The plant that’s in the one I made hasn’t grown any differently (easier, better, faster, healthier, etc.) than plants I’ve grown in fabric pots. But it takes up more tent space. So I seriously doubt I will do them again. I’m even trying diy self-wicking buckets in my backyard for the super hot peppers I grow. I’m not experiencing any benefit with those, either.