I find the even the side airflow holes can be messy on the Mutation, but that's only my opinion. The Tobeco Velocity is exactly what I use. It costs a little more than some other clones, but the overall build quality seems much better, and it's still MUCH cheaper than the authentic. I'd love to buy an authentic to give props to the designers when I find one, but I refuse to take a chance on eBay. I have a mini version from another company and the grub screws strip very easily, I've changed 2 already. The o-rings are also a bit on the thin side. The cap is a little bit too loose allowing some seeping through the bottom from the vapor collecting on the sides. Having said that I just keep chucking with the Tobeco...