I've got bookoo cart's around here I'll never use. I've got atty's laying all over the place. I tried my first atty once. . .it burned out! I threw on an Cartomizer and never looked back. Kids like to mess around with stuff. Kids like to show off their stuff. All l want to do is walk out the door every day to work and not have to mess with anything the rest of the day. eGo is good, RIVa is better. (JMHO). I have several of both. . .rarely use either anymore. But, anything that "class" should get you through a work day power-wise. C-E2 R4 XL carto, (short for cartomizer, not to be confused with cart), holds 1.8 mL's of juice. I vape lots. Smoked at least 2.5 packs of tobacco cigs, (analogs), a day for better than 50 years. I fill two of those cartos with a syringe for use every day. My PV with a filled carto on it, and spares in my pocket, batts and carto. That's it. Save your money and spend it on all those thousands of flavors of juice to try. I've only one flavor, and tons of it around here. It's all cinnamon. I don't want to be tethered to my computer with a cord. Don't have to mark my cartos, cause they're all the same. Ford had it right, you can buy any color model T you want. . .as long as it's black. A true addict knows you can't afford to run out of whatever you're addicted too.
Cheers,
otrpu