Hi, and welcome to the ECF!
V2 cigs are not a bad product, but not very good either, and somewhat overpriced. The V2 cigs are pretty much standard "KR808D-1" vaporizers so you can use their batteries with any other KR808D-1 cartomizers and viceversa. I would compare them with other similar products like the Volt from Somkeless Image and the KR808 cigarettes from Vapor-4-Life. However, if you bought one of their larger kits, you probably spent to much.
Regardless, you should definitely look into filling your own cartomizers with e-juice because that's significanlty cheaper and more pleasurable than buying pre-filled. Look around the forum for more info and ask away if there's anything specific you want to know more about.
I'm sort of new to this, but I initially started with V2. There are lots of very experienced people around to help.
And no, you are not "committed" to V2. They have a 30 day return policy and you can use a lot of other stuff with their batteries. Also, if you decide to keep them, you might consider buying a pack of blank cartos from them once in a while, as if your account is inactive 90 days people say you lose your lifetime warranty on batteries.