I am new to the Vaping world, though I fell fast and am already all in. Long time smoker, recent convert to Vaping. Surprisingly easy transition. Trying to figure a few things out, though. What's the story with Knock-offs? Recently I bought a Vamo, and am very pleased with it. A friend who's been around for a minute or two looked at my unit and said that because it didn't have an official stamp on the bottom, it wasn't the real thing. And that Vamos were among the most copied units around. Is that a problem, should I care? Of course if I'm happy with it I'm happy with it. But I'm curious about this. Is there a general consensus about Knock-offs vs. authentic products? Thanks for your thoughts on this.