This is a really nice vape actually. I grabbed one of these as I had it on my radar to grab a backup regulated mod to replace my iStick 30w which is 3 years old now and the battery has started to drop off a bit. I wanted something that used a replaceable 18650 and couldn't say no at this price.
Although it felt a little heavy in comparison to the iStick, after using it for a couple of hours it's a nice weight like the way a mech feels nice and solid in the hand.
I'm not sure if it's the way the air vents are designed/line up, or if it's a smoother power delivery than the iStick, but this is giving out a cracking smooth vape on my KFL+s at ~1.2-1.3ohms and 11w-13w. Similar to the smooth vape I like from my mechs when compared to the iStick.
Really pleased with this purchase and I'm now retiring my iStick to the cupboard as my backup mod and putting this in the daily rotation with the mechs.