Revelene,
I guess the disconnect is that many people don't seem to have the same experiences as you do. I've bought a LOT of different very inexpensive heads from FT. CE4/5/6, EVOD types, most less than $2/ea. Also drippers, gennys, etc. A surprising favorite was their all-plastic Vivi Novas (all plastic except the base, of course) which for less than $3 each give me a great flavor.
I've had very little, if anything that was total garbage. A few items that needed some tweaking (for rebuildables, the first step is always "yank out whatever coil/wick they put on it"). Their EVODs and CE4-styles have never leaked for me (unless you screw the head on too tight, and it winds up unscrewing the inside coil head). I've never gotten a shorted or dead head, and with an occasional cleaning, get very long life from them. In fact, one of the most frustrating things nowadays is that I'm into winding my own
coils, but I hate ripping apart a perfectly good one just to try to replace it with something that may or may not be better.
If you want a real power-hitting head, you have to wind your own IMHO.
But for what they are, I've had very good experiences with the quality of the Chinese products. I DO read the comments before buying!!!
Your mileage may vary (and apparently does....)
I would like to know what heads you've been having problems with.... Perhaps you've just picked a bad vendor?