I got the turbine base with helix mouthpiece. I feel like with all 3 holes open in the helix mouthpiece, it's too hard to pull (especially when using an ash catcher), so I usually tape them all shut. Also, after owning it for around a year, I feel like it gets clogged faster. The turbine base is gets clogged pretty easily. If I had the opportunity to buy it again I would get a different base (maybe beaker).
Besides that, excellent bong. The hits are really smooth, and you can fit it in smaller bags since it comes apart.