I've never used a VS, so I can't comment on that. But, after having my sig 100 for a week, this thing is perfect...at least for me. I'm keeping it at around 15 watts with my aerotank. Last weekend, I got over 48 hours out of my VTC3's at moderate usage. Last sunday, I swapped batteries with Panasonic green ones. Started those at 90%, currently at 42% (this is my home/evening mod). When it goes to "sleep", the wake up time is very short, much quicker than my (ch)dna30, barely noticeable. This thing also hits way harder than my hana DIY kit. While it is a little wide, it fits my hand pretty well. The square/semi rounded edges may bother some people, but i don't mind them as they're not sharp. So far, my biggest complaint is that the battery contacts don't have coil springs. There is some movement in the contacts, but not much. This limits you to using only the shorter 18650s, any of the longer ones or protected won't fit.