Personally, I like the Penstyle e-cigs. They have very large carts which do not require refilling as often as other models. And they have long battery life ... Again, they will not require recharging as often as other models. And of the Penstyles available, my preference is the RN4072. Reason: Best Flavor.
My second favorite model is the e-Cigar. It also has a very large cart and very long battery life. Plus, great vapor production !!
Both of these models are currently on Sale @
myPVshop.com
Plus, use Disount Coupon Code: IVape10 to save an additional 10% off your entore order - including sale items.
My third choice is the KR808D-1 series. Primarily for ease of use. It is a 2 piece design with disposable Cartomzers. My supplier of choice on these is Drew @
Nhaler.com Discount Coupon Code: SAVEinNJ for 10% off.
These are just my personal preferences, but I hope this helps someone in some way.