Also, it's absolutely baffling when you first start out. The different models, the different types/sizes of batteries, the cartos with the flavors and nicotine strength, the chargers, etc.
I started out by researching on the ECF forum which brought me to V4L. I chose it because it seemed like a reputable dealer with many happy customers. But I have to say, the first time I went on the site, I was overwhelmed by all the choices. I honestly didn't know where to start. So I just dove in, bought the "ultimate ultimatum kit" (I figured all that stuff would start me off on a good foot lol) and bought a couple of boxes of carts. I wasn't crazy about either of the flavors I chose (but not to be deterred) I placed another order for 5 sampler packs, and with the freebies that V4L threw in, I ended up with about 30 different flavors - and finally found the ones I love and in the proper nic strength.
When people ask me about my ecig, I tell them the truth. I tell them it's not exactly like smoking a cigarette, there's a learning curve involved and you have to expect to spend a bit of money initially trying to find what's right for you. After that it's up to them.