This is my favorite dab rig, in fact, I havn't used any other rig since I got it. I do believe that it has some of the smoothest hits possible. Contrary to some different reviews, I have found this to be one of the easiest to clean. Salt and alcohol in the top chamber and a little in the bottom chamber, and a little bit of shaking and it's clean. I love this rig and love Science 420.
This hit is enough to knock out any rookie. The double percolator makes the smoke very soft, and the bowl is not very big. The only drawback is the difficulty in cleaning it. However, it is an excellent piece at a very good price.
This piece is absolutely wonderful and is my current favorite in my collection. I love the color scheme but more importantly it hits really smooth, its easy to rip it a little too hard as the airflow is a bit tight but once adjusted this provides smooth silky rips. The dome on the circ perc gets dirty very easily and is difficult to clean entirely unfortunately but the piece is pretty and well thought out. Big Fan.
Cannot stress enough how smooth this hits off of this guy are. The functionality is great and does not sacrifice aesthetics. Thick glass and beautiful when kept clean.