When cold, the rips I can tolerate are huge compared to my normal beaker bong. Even at room temp, the small diameter of the tube hists better than my normal rig. I find the glycerin, after an hour in the freezer, stays cold for half an hour or so. I'm still experimenting with freezer time lengths.
I'd love a second glycerin section to swap out so I could always have one in the freezer when smoking. I was here looking for that and thought I'd leave a review. Shipping from this site is way slow, though.