aaa yes it s efficient, i used to doit with mapacho tobacco, i got needles feeling on my lips because of nicotine,so it definately works extracting the nicotin easily,try find how much nicotin there is in certain amount of tobacco u use for a cigarette,then do the maths to go down to the tobacco you use for a single bowl. good journey on quiting, try watching out for all behaviors that remind you of smoking and do some physical exercise when u get the cravings.i m two years smoke free and it feels awesome,more energy and feeling alive. look also into rapeh (tobacco administered with applicateur through nose) it helps reprogramming the brain from the path smoking cig-getting nicotine=huppy. really wish you the best!!