I think you mean 3VO. That one does look interesting. It's hard to know a lot about it though. It looks good. Two 16340s should give good battery life. It's preset setting are pretty close to where most with infinitely variable VVs wind up. I have seen one post where someone had a problem with one but, one post isn't a good indicator unless it draws a lot of me toos. This one didn't. So, there's no reason to believe it's a bad product. I haven't seen any I just got a 3VO and I love it posts either. They are out of stock it at the moment so I guess someone likes it.