Most people get something like one of these(yours truly included) to try and see if vaping might work for them, I think these are just "Demo" models at best. I had the Rn4081 and while some love it, mine was crap and I sold the charger to someone and threw in the cig for parts. I have a DSE 103 and it is 10 times better after I modified it to use Dura carts.
That's my only issue with the mini's is the small carts.