Smoking a Tracy Mincer Oom-Paul with Lane mild cherry ( I forgot Lane`s number,letter combo) and a freshly brewed mug of coffee. I have had this pipe for over a year and everything I smoked in it gurgled, I recently got a bag of Nording`s keystone pipe rocks on a friends recommendation I put 6 or 7 rocks in the bottom of the pipe and the pipe is smoking great so far. I have smoking for about 20 minutes and it seems to be working well. To be honest I thought this would surely be a waste of money, I am impressed. I will report back on how it works on some of my other gurglers.