I agre on the eGo-C, I also found that for people with limited budget or people that want something that looks almost like a cigi, there is also the eGo-510T, the T stands for the tank, which is smaller but similar principle as the eGo-C tank. The battery is very small and will not last long if you are a medium/big smoker (+5 day). That being said, you get 2 in a starter kit and they are 1/2 price.
I found that new lady vapers (casual/party smokers) enjoy the eGo-510T, because they can get it in all different colours and it looks like a cigi (go figure !). That being said, most eGo/KGO cannot run LR (Low Resistance) atomisers/cartomisers, you'll kill your battery in no time.
Either way, if you get serious about vaping, the eGo-C could quickly end up in the draw or be used as last resort emergency, an eGo-510T will end up in the bin.
Ego-C kit retails for around $80, the 510T for around $40.