My first 510 thread battery was a disaster. It was some anonymous gas-station pen that died in two weeks, burned through cartridges unevenly, and eventually leaked oil all over my nightstand drawer. I almost gave up on carts entirely. Then a friend handed me her LOOKAH Bear and said, “Just try it.” Two months later, I own two Bears, I’ve gifted one, and I’m writing this review to tell you what I wish someone had told me before I wasted money on junk: start with the Bear.