After smoking for 40 years I switched to e-cigs. I love them! I bought a product from "Smoking everywhere" Not happy. Then I bought "Vapor4life" Much better but lately their products have been shoddy. The automatic batteries fail and I don't care for the push button as I'm a window cleaner and both my hands are busy. I've recently heard about the E-tank and I'm very interested. I've also heard about the 5-10 but not sure if that is just a standard term. I've seen Youtube videos on putting tea bag mesh in the cartridge to improve the product. Can someone tell me their thoughts about all the above? Essentially, what I want to know is what is the best product (E-tank?), best brand and how do I get it.