Hopefully this isnt the noob leading the noob, but I totally dig my KR808, which is what you would get from V4L. The one I got was the Revoloution from vaportalk, and those batteries would last me about 8 hours. However, I did quickly upgrade to a PigCig from lecig.com which works with the KR808 cartos. For me the 2 piece system of the KR808 was better for me. Just sayin' and everyone has their preferences. I thought at first that the need to have it look like an analog was important, but I quickly found that to be a non-issue once I got my PigCig. I ♥ my PigCig!! My PigCig will last for 2 days on a charge.
There is nothing at all wrong with KR808s. I used them for my first 4-5 months of vaping, and I enjoyed them very much. Then I took the same change in direction as most (but not all) KR users take, which is moving to high quality LR atomizers (as well as SR atomizers with higher voltage devices). The reason is simple - you sacrifice a small amount of convenience for a very large increase in performance. The bottom line is that there is absolutely no cartomizer on the market today that can give as much taste, vapor, and longevity as a premium LR atomizer like a Cisco or an IKV (or a SR like a Joye, SLB or IKV).
I recommend new users just start with the LR/eGo setup because that's where 9/10 will end up anyway. It's simply better performance, so why not just start with a better setup right off the bat?
But as always - use what you like best! If you like it, it's good. (The PigCig is very, very good - it's flat out excellent with a LR atty!)
-Russ