None of the claims are true, however, we don't buy based on vendor claims, right? Here is my hands on review.
A friend of mine bought one of these and my first thoughts were not dissimilar to the above posters. However, a few minutes later my friend brewed a tea for me that I know very well in the pot. The low firing is ugly, and the pot isn't worth a penny as a collectible. But it brought out another side of the tea than I've had before. I bought one for the office, it makes pretty short work of cheaper Yancha that ends up in my office drawer. Bitterness and burnt tastes down, fruity tastes up. Was worth the few dollars to me, given the 80 and 50ml sizes I was able to guiltlessly leave in my office. I don't exactly miss them at home
Did not attempt to use these pots without hours of boiling and an all day soak in tea leaves. You shouldn't either.