I've had my Provari for about two weeks after dealing with mechanicals and eGo twists for several years. All I can say is WOW! I'm not sure why, but the vape from my Provari is so much more consistent and smooth than my twists, even though I set them both at the same voltage. And, yes the build quality is fantastic. It was a real pull for me to afford a Provari, but I'm happy. In fact, I'm already planning to save for another one.