Another volcano convert here. Haven't actually gotten my PD yet but its in the mail. I must say though that the volcano is a great machine as well. They both serve their own purpose. The drawback with the volcano is that you end up using more than with the PD. Plus I don't always want a whole bag full. Where it excels is when you have multiple people sharing a bag. It is a great party vape. I just needed something smaller that can be hit real quick once or twice and then put down. The PD fills that niche nicely. I love that it is lead free and safer than most of the other alternatives.