Can't go wrong with a vamo. If you spend more , you're not getting more but a name. I was using the vamo with 2
batteries, but now with one. And it went well, so I got a twist and that's great too with a lower ohm clearo/cart. The vamo is well worth the money, and I've had a lot of mods over the last 4 years, and 2 pricier ones actually needed brass maintenance to work well. It was a PIA. Now I just want simple , charge, fill, and go. I'm also happy with my twist. I've had the vamo for about 6 months now and never an issue.