Right, on my second on of these this year.
They are excellent when they work, much better than all the other Caliburn ones (have not tried the new new one though...)
Good airflow for its size, as much better than the G and G2, the magnets are awesome (though im not sure if these are causing coil issues in the long run)
One thing i hate, having the press the fire button 5 times to turn it on and off. I have spoken to some people about this, i know its a standard and all, and good, but it breaks the things way past their due date.
My first one, started randomly miss firing, left it alone for a month or so, then it was fine, then 2 weeks later it started happening, then one night it was just fine again, this one still works, lol.
Second one, the fire button is now completely dead, the only way to use it is inhale naturally, that seems to be the only problem, but that one the button started its slow dive into death after about a month.
At least the pro is they are incredibly cheap for how much i like them. The whole UWell company just needs a bit better QA, it has definitely gotten worse since i started using their stuff about 5-7 years ago....
At the end of the day, i would recommend though due to the price, just wish the coils where at least 5 bucks cheaper, would make the faults easier to swallow.