I can empathize with the frustration of unsatisfying vape products. I too spent way too much money on e-cigs, moving from brand to brand, style to style, until I found what worked for me. In my experience, the cig-a-like vape products (like the one-shot disposables and the rechargeable cigarette-shaped batteries that take cartomizers) were wildly inconsistent. I'd buy a 5-pack of cartomizers or disposables, and only 3 of them would actually work. I'd pop a brand new cartomizer on a freshly charged battery, only to have the atomizer burn out after a few puffs. My Blu charger stopped charging my batteries after less than two weeks of use.
The ludicrous amount of money I wasted on poor-quality e-cigs caused me to relapse and start smoking again on three separate quit attempts. My most recent resolution to quit lead me to research the latest vape technology, and I discovered the reasons behind my negative experiences with e-cigs in the past. Turns out that many companies were buying their batteries and cartomizers in bulk from China, sticking brand labels on them, and selling them as a standardized product that was anything but standardized.
With the advent of APVs, I learned that electrical terms like "ohms", "watts" and "volts" were HUGELY important to the end user experience. The reason I was burning out brand new cartomizers was because the company didn't bother to make sure the electrical resistance on those carts was uniform. They just bought a bulk load and re-branded them, focused on the bottom line instead of the quality of their products.
APVs have changed all that. With the ability to adjust the voltage going in, the wattage coming out, and the ability to test the resistance of your tank, it has become far less likely that a vaper can unknowingly burn out a coil. Additionally, one $20 reusable tank and a $10 bottle of e-liquid will greatly outlast $30 worth of cig-a-like cartomizers or disposables. If you remember when e-cigs first started hitting the market, one of the common selling points was that they were supposedly cheaper than regular cigarettes. With APVs, that statement is finally accurate.