I've had a V2 for a few months, and the V3 for... Hmmm... A month? Anyway, I love them. At first it took some getting used to; My first VV was a Vamo, and it annoyed me to have to do the multiple button push to change things, and I disliked having to actually fire the device to check the resistance. However, now I'm completely sold, and I love being able to twist to accommodate different sized batteries. The clicks have become second nature, and I really love the look and feel, particularly with an 18350 (though most of the time I use an 18490). Pretty much I keep them both with me 24/7 and my Vamo has been relegated to the shelf. It's starting to get flaky as it is. Threading is "off" and sometimes atomizers won't screw on properly, and the o-ring in the connector keeps popping up.