E-cig devices
The CE4 Kit is the cheapest vaping device you can get and is the perfect choice if you are new to vaping. This e-cig is better used with 50/50 PG/VG e-liquids that produces less vapour.
Vape Pens
Nowadays the vape pen has become the default e-cig and as a result has sort of replaced the CE4 Kit and is probably the most common device that you see people vaping with. The vape pen is slightly bigger than the CE4 as well as still being inexpensive. It has been much improved over the CE4 models with a bigger and better coil to give you a more enhanced flavour and bigger hit and is suitable with e-liquids that have a higher VG content.
Mod & Tank
The Mod & Tank are the most effective way to vape and come with many advantages such as improved battery life over the pen and CE4, more power and are designed for both low and high VG e-liquids, however these are more for the experience vaper and come at a higher cost than the pen and CE4 models.