Although this stuff does not scratch, but it feels as airways would constrict, got extreme coughing. Although without dirt and easy to fill in the head, but unfortunately that's about the only plus point. Smells very strict and artificial. The taste also leaves much to be desired, that is not very intense and very artificial. The smoke is quite OK, but takes a long time because the stones need a lot of heat!
So I will not order again. I stick to the tobacco.