Well you can take my word for it as an avid vaper for 2 years, those things are cheap toys and will not satisfy a smoker. It is simply too underpowered to provide satisfaction. I started out with the crappy e-cigs and ended up spending tons of money buying different models that were not satisfying me until I got my first eGo, and I stopped looking because I had found what I needed.
The vaping community
is huge, and they are serious about their vaping gear. People were rigging up huge 'mods' with powerful battery arrays and dual- and triple-coil atomizers to increase the power of their devices to get the nicotine hit they desired. Now the technology has advanced and you can get a similar experience using the low-resistance 510 atomizers on the market today paired with the eGo battery. These are incredibly popular devices, just go on youtube and see all the happy reviews:eGo reviews
If you don't want to take my word for it, feel free to do some research on these cheap underpowered devices and you will find that the people who buy them have to go back to regular cigarettes because the cheap e-cigs weren't 'doing the job' for them. If there is a demand for them, I could sell the cheap ones too on my site, but I don't want my customers to buy something they will regret, or try the cheap e-cigs and give up on vaping altogether because they think all e-cigs are like the cheap ones.
Those cheap ones are mostly sold by companies who sell a huge variety of cheap Chinese junk and who have no idea about vaping gear, they just want to push inexpensive products. If you go and check out the largest e-cig stores online you will find the same products I'm selling because that is what the real vapers want.