It cools well and the airflow is less restrictive than the water bubblers I have.
This includes one of the 14mm bubblers I purchased on this site. The diameter of the stem where it enters the vaperizer cap is slightly narrower than the XMAX V3 Pro but fits perfectly with POTV One/Lobo.
It doesn't cool as well as a water bubbler, but it cools well. The bonus comes in cleaning. This is much easier to clean than a water bubbler and there are no concerns about spilling when on the go.