Classic Pen Style is the first generation electronic cigarette that started the industry. Although this particular model is fairly large in size, it is heavily preferred among many veteran e-smokers due to it's exceptional value. The Classic Pen Style is loaded with a big four-hole atomizer to give you an extremely easy draw, a long-lasting battery, and a super big cartridge that holds at least 15+ drops of liquid. 
We certainly recommend the Classic Pen Style if you are looking for the smoothest inhalation possible, combined with stamina and performance.

Pros: Super smooth draw, long-lasting battery, easy to refill cartridges

Cons: Long form factor, No USB passthrough available.

Overall: Although very long in size, the classic pen style features the smoothest draw, and a quality four hole atomizer for a premium vapor texture.