If I realized this was a vertical build RDA, I would not have bought it. That being said, It's a great little atty. It has lots of flavor and a perfect amount of airflow. It's well made and surprisingly easy to build on. I put a couple 2.5mm Ni90 verts (.18) in it and the vapor production surprised me. It blows the 454 away. I have been using it since I got it. I do recommend this RDA for anyone who likes 22mm attys. And you can't beat the price!