I love the Lemo 2 except that I can not get it to stop leaking, I have to use vice grips to get it open and that o-rings seem to be difficult to find. I love the taste of it. I love the ease of putting on a coil. I love how easy it is to top fill. I love how it hold 3.5 ml. But the drawbacks especially the leaking have me looking elsewhere. What else is there that is like the Lemo 2 that has all it's good points but none of its bad?