I've mentioned in many threads that a smoker friend of mine was interested in switching to vapeing. Since she was new I recommend something easy. The istick 30 (since the 50 had such a bad reputation) for awhile she was very happy. She bought two. One is still working fine, the other died right after the 30 day warranty. Honestly I wasn't surprised. As said these cheap mass produced mod's are a crap shoot. I don't want to see her quit out of frustration, so my next recommendation will be for her to spend the money for quality.
I was sure to buy another pair after ordering the first four upon first sight to cover all three 50w iSticks since if one needs recharging I simply grab the next while one sits in mod stand at the present time where I keep a 20w Vamo V6, the ZNA 50w all stainless tubular shape with vertical display not a little square one like a vamo, The 20w Vamo fire is in a small four battery round stand next to the other, The SMOK 50w BEC Pro and 15w Vamo V5 in the other mod stand leaves room for buying a few more even!