If you're often doing things where it can get banged around, DEFINITELY the twist (I actually prefer Vision Spinners), but the v3 is nice with it's variable wattage, pass
through capabilities, and can act as an ohms tester for your attys. Fragile as ....... though. Really lightweight design. Not durable at all. mine fell all to pieces and I wasn't abusing it, just stuff that would happen in my pocket, severe denting, bottom coming off, but I caught it before the wires pulled so it still worked. Oh, and it's noisy too. It has
three square plastic buttons that all rattle around more than any other PV I've
personally seen.