Why the S. Zmax is absolute garbage. Anyone else out there have an unfortunate experience?

So far both of the S. Zmax's I've received have been nothing but a pile of shit. This is the second time I'm having to RMA a brand new unit. I'd rather not say the name of the vendor, but in their defense they were quick and responsive to resolve the issue.

The first Zmax came with a loose top cap, after a week of use it fell the fuck off the main body of the unit. Insert almost 2 weeks to RMA and get a new one. I pulled the RMA out of the mail a few hours ago, and THIS ONE IS FUCKED UP TOO!

As soon as I screw on a tank it begins firing at around 3.7 volts. No screen activity, no hitting the button, it's just fucking firing. If I do actually hit the button, it fires maxed out at 6 volts. I used a threaded voltage meter to get the readings. Tried with three different tanks and two batteries. It absolutely destroyed the first tank that I put on it, because by the time I heard the destruction occurring my brand new Kanger Protank had fried itself.

By the time I end up getting my 3rd RMA, it will have been over a month since placing my order for the first one. Still stuck with my SMOK telescope, and it's not kicked. Maybe the vendor will hit me back for the shipping costs.

Stay the fuck away from Zmax's, but if you do have one that isn't a pile of shit, I'm very jellies.