To be honest, I only tried it out a few times before I sold it and never really climbed over the learning curve, so I don't really think that I can give you a valid opinion, other than this. For me, efficiency is really important, and is the reason why my PD is my daily workhorse. The bowl on the VapoStar, by comparison, is huge, and would really require a lot more bud to at least just cover the screen to get a few decent hits, so for me, due to it's lack of comparable efficiency, it just didn't work out. If however, efficiency wasn't at the top of my priority list, than I would have given myself more time with it to learn how to use it properly. All vapes have a learning curve, and the VaporStar isn't an exception here. Lots of people like it though.