Save a ton of money and invest in a Tesla invader 3, basically the same thing, but smaller and costs around £25, or of you want something bigger try the ijoy zenith, again same basic thing, only a 3 cell setup and costs £30...
And yes, ramp up on these vv mods is excellent, as is battery life!
I actually tried a friends Invader 3 and whilst I did like it, the HexOhm just felt better in almost every conceivable way. Not too mention the INCREDIBLY solid build quality, life time warranty and the fact it's ALL made in the US.
Wouldn't have paid full RRP for one though. Got mine second hand.