After burning out on my eGo-T I went to a Megalodon. I played with the different voltages, different feed systems, etc, but still had my original problem: lack of reliable simplicity. Then I got a REO, and then a Hog's mod. Issue solved. IMHO, and for my money (paid $110 for either, used and new respectively), bottom feeders are the only way to go. Being able to stuff a bottle of juice that will last all day or longer and a battery that will last all day or longer in and go was priceless. I don't have time or patience to fiddle with topping off carts or trying to get a tank to feed without leaking, and I never have to deal with any of that now. I also found I could replicate the vaping performance of all but the highest voltages by using lower resistance attys. I'm using Cisco LR306's right now and can get a hot hit with plenty of vapor without feeling like I'm sucking on the business end of a flamethrower. I might try a VV Hog once Mike makes them (soon) just to play with, but I don't foresee ever going back to a top feeder, regardless of what's underneath it.