Cool tube, definitely sneaks up on ya! As for function the vortex is quite present when clearing the pipe, but no so much when building hits. The ash catcher is also a neat addition, personally I like the tube by itself better. Lastly function takes a second or two to start, while the draw on this piece is very smooth with the tornado pushing the smoke up it is the opposite of a choppy draw like from a beaker.
Perfect draw for stacking those big milky hit! Thick clean glass! Great addition to any collection....the matching ash catcher is epic!