I've had the RX200 for about two weeks now and I'm really impressed. Heavy vaping for hours upon hours and still I'll have battery life to spare. It's made hanging out with friends on the weekend (We all vape continuously while playing games, talking, and drinking) much more convenient as I no longer have to bring multiple spare batteries with me. I also don't wind up accidentally swapping my batteries out with anyone else's when intoxicated late in the night anymore, which is nice, because it's a bad feeling when you get home, pop a battery out, and realize it's not as good as what's supposed to be in there.