I have a tube with 4 disk percs, 12 slits in each disk, and a 4 disk perc ashcatcher with 3 holes in each disk. I've owned a 2-4 arm tree tube, 3-10 arm tree tube, a 14 arm tree tube, a 24 arm tree tube ( all with an 11 arm tree ashcatcher), a Hi-Si triple u-perc tube, and I've hit a helix bong my friend had but none of them are even comparable to the disk percs (out of those the Hi-Si was smoothest). The only one that gets close to hitting as smooth as that baby is this new SYN mini-tube with a bottlecap perc I just bought. It probably has close to 100 tiny holes around the edge of the bottlecap. The air comes up through it instead of out of it (like a hi-si)and it hits like a dream, too, but the disk perc bong cost me a little over $800 and the baby bong was a little over 5. Totally worth it, though. I guess you could say I'm a bit obsessed with cannabis and cannabis smoking utensils. I'll post some pics of my pieces if you guys like.