I just filled three pipes with the same flake. The first, new one "bent" model with very tight tobacco, was horrible of course and I didn't smoke it. Another pipe of the same type "bent" with a correct filling, in my opinion, I enjoyed it but not much (also leave after few puffs). The last in pipe "full bent" my favorite pipe and Bingo! I enjoyed it a lot. Is smoking a pipe an art? is trial and error ?