I bought this piece because i was interested by the idea of the double downstem thing its got going on, and honestly I'm not disappointed, while the airflow is slightly restricted due to the small bore size of the holes in the downstem(s), but I dont even see it as a flaw because it helps to restrict splashback when absolutely ripping the **** out of the thing; which brings me to my favorite part, once you get the water level just right on it (which id say is like 1"); you can absolutely destroy whatever your smoking through it in one hit.
Overall its an extremely nice and sturdy piece that provides super smooth heavy rips, and its a great addition to my collection, and id definitely suggest it as a starter rig!