yes kangers can be finicky if you don't let the wick saturate first and screw it on to tight, but found once understood, they provided a fair vape, and Hassel free. Just because you don't now how to operate one correctly doesn't mean it's garbage. And they do make a decent hand me down to a new vaper. I quickly moved beyond kanger and stepped up to rba's. the i30s, looks like a decent product, and know the Aspire BDC is an excellent tank for those not ready for rba's. Also Kanger is coming out with a PT 3, which looks promising, dual coil BCC tank.
That's why there are so many choices, something for every one, no one thing will please all.. We all have our likes and dislike, our abilities and limitations. I will probably never use another PT, or even try an i30 s, Only tried an Aspire because a friend bought one and he let me have a vape on it.
Any tank out there you can mess it up. If I didn't saturate my wicks on my rba's before assembling them and filling them, and tried to vape them right away, I would get dry burnt hits, I would think it was garbage, and worthless. But since in know how to use and build and prime and fill it correctly, it produces awesome vape. All my rba's do. I also know that the Aspire is not junk, and when used correctly can be vaped at 15 watts. If one doesn't know what they are doing, it is not the atomizers fault, it is user error. Sure, you can always get a defective product, if it is truly defective, you can send it back, and get a new one. I suspect that most problems are user related.
Unfortunately, everything vape related takes time, money, trial and error to find what works best for them. This is true with every thing, form pvd's, atty's and juice. You have to date a few losers before you find the right match.