I am happy with mine, use it all the time. As long as you build according to your batteries your good.
Its got all the safety cutoffs of a normal regulated mod.
Running a 22g, 8 warp dual kanthal build in my petri at the moment and there is no rampup on half power, love it.
Only con I found is that if you are not careful it can rip our battery wraps when taking them out.