i am about 3 weeks into using cartomizer style ecigs. I like them a lot better. Flavor is as good as a 901, throat kick is a blast, vapor is great when they get warmed up.
As stated earlier you can refill them more than a couple times, some people have used a single cartomizer for over a couple weeks. Single cartomizer with 10 drops of juice in it lasts me a couple hours, in same amout of time i probably would have dripped more than 10 drops on my 510 or 901.
Unless you have really good luck or just outright baby ur traditional atomizers i think its worth the price that you get 5 packs of cartomizers for the same price of a single atomizer.
If you already own a 901 Personal vaporizer keep in mind that the threads are compatible with the kr808d1(cartomizer style) batteries, sooo just incase u find yourself wanting to go back to traditional 3 piece PV then just slap on one of your old atties with extended battery life!
YouTube - quicky 2piece ecig review thanks v4L
I tried to keep this video 3 minutes long so i kinda rushed it. My 901 passthrough kinda cut out on me i n the video, what i meant to say is the throat hit, but noticed the lack of vapor and said that instead haha