For the past 4 years I have loved the Palm. I have bought several and came back for more, only to find the new Palm Pro. Of course, I had to try it, and see how they could improve on something I already loved. CCELL did not disappoint! The added ability to change the voltage settings means no more over/under drawing, based on the cartridge being used. The preheating is a nice feature, if you like that. I typically don't use it, but it works well on this unit. The best change, for me, is the air flow adjustment. What a game changer! No matter the fit of the thread and how dirty it becomes between cleanings, you can completely control the type of hit you want to take using this feature. This is definitely worth the little extra money compared to the original, and I wouldn't have traded the original for anything. Aesthetically, they have some nice new colors for the pro, and you won't notice the button. The air flow switch sticks out, slightly, but not enough to get stuck on things in your pocket. The pro is also slightly taller, and I mean slightly, maybe 1-2 mm. The three dash-like battery lights are a nice change from the one circle, and are also used for the voltage setting. It does use the Type-C charging, so older chargers aren't compatible, but again, CCELL provides a charger with the unit, as well as two screw on threads, as before. The charger cable is longer than the original. A plus for me, but could be a negative for some. The only real issue for me is the hard to clean spots, but I've found if you clean it regularly, it helps with longevity.