I also bought them and am very satisfied. About the container, I bought a second one. Now I have one made of stainless steel and one made of aluminium (unfortunately, I don't remember which one came with the ice cream machine...). The containers work perfectly, the machine has by far enough cooling capacity and the difference in thermal conductivity between aluminium and steel is great anyway. Super product!
(Shouldn't the whole thing actually be here in the reviews...)