i got a 510 kit for my mom and thought it was ok. Then i got a kr8 for myself and once i discovered LR atomizers things got better. Drip tips of course are a must as well i didnt have those till recently. I got the prodigy v3.1 with 6volt mod. I didnt care for that at all. Too hot not nice hits. it was too heavy and big as well. So i returned that and now i have an ego(blue batteries, very nice quality) and i feel like i finally got the right kit. Ive been using it for about 12 hours so far and have enjoyed the look,feel, and functionality and everything about the ego far more than anything else ive tried. Thats just my personal experience in the e-cig world