I've been vaping about 5 months now. I've done some research on the Vivi Nova tanks for Vision and Smoktech. I bought two Vision vivi nova 2.0ml tanks and a 3.5 too. I have enjoyed them none stop for the past 5 months. I recently bought a Smoktech vivi nova tank. I wanted to compare between the two. I was sadly disappointed with the Smoktech. Only having it a week the tank cracked all the way through on two sides ( it wasn't any e-juice that I hadn't used in the vision before). After getting another shell I tried it again. The wick is splitting and going into the threads for the top cap. It has also been leaking from the bottom air holes ( have not overfilled the tank). One other thing is the drip tips. Vision has a small silicone piece in the tip. I think this keeps condensation from forming in the drip tip. The Smoktech drip tip constantly has condensation in the top which gets in your mouth. The Smoktech also gurgles a lot. Tried getting all the excess fluid out, but keeps doing it. So, in my opinion the Vision Vivi nova tank is far better. It is reliable, easy, and sturdy. I have had nothing but trouble with Smoktech. Even though the Smoktech is cheaper, that's for a reason. Spend a little more and get the Vision.