i have to say, once i found a cartomizer that seemed to be idiot proof enough for me not to have more juice in the catch basin than in the chamber for vaping, i am now down to my reos mini and nothing else. After spending the weekend hanging out with a group of friends (that i got into vaping) and watching them obsess over finding an ego tank that doesn't leak or give them a mouth full of juice, I really began to appreciate the simplicity of my reos box. Other than making sure it doesn't end up upside down and leaking just a bit from the bottle, this thing seems to be hassle free...