You get what you pay for seems to fit most types of E-cigs.
I do say "Most" because there are some WAY over priced ones. Those are just rebranded generics someone thinks they can make a fortune selling.
In general, these are basicly disposable. Like a good Lighter, it may work for months, or days, but basicly the same idea of disposable. Even the good ones, you need wicks, or butane, or flints, or some parts. BUT, like a real good Zippo, has a long warranty, and costs more then the cheapy ones at the gas station.
Hope that made sence.
I LOVE the pen style and have bought several parts from different sellers. Some parts lasted a weekend, others a month. but all the parts no matter how much paid, wore out.
The batteries last longer then the atomizer, that lasts longer then the carts (carts can be refilled and cleaned several times.)
I am going to Splurge on a Janty and see if its any stronger then my DSE-801 Pen.
From what ive seen and read, it should be, but even those will go bad eventually im sure, i "think" they even only have a 6 month warranty.
If you think about the parts, some Can be made better, but none can be made indestructable. That small, things get touchy, and brittle. The heating elements are the worst. The auto switches are my Pain in the ..... They seem to work when they want too.