I bought this from Vapors Heaven for $48.95. I was weary about purchasing it because I've never heard of this website and I wasnt sure if the Vgo, was just an Ego knock-off. Both the Vgo and Ego look the same, with a few differences. This Vgo lights up blue at the tip of the battery, it came with 1300mah 3.7v batteries and is threaded for a 808d. Me being a 510 guy, i was skeptical at first...but now im just confused. The Vgo produces as much vapor, if not more as my Ego. The thing that confuses me, is that I only use LR cartos on my Ego and I only have the stock 808d cartos that came with the Vgo, so why more vapor? Well, either way, im completely happy with this purchase. I should be getting my 808 to 510 adapters in tomorrow, Im def going to try this thing with LR 510 cartos tomorrow.