My 510 started to go bad a few weeks ago, coming loose from the press fitting, allowing about 5 degree port, starboard, fore and aft tilt to the atomizer. Wasn't much longer for this earth, and it was causing inconsistent resistance readings as well.
That said, I got mine in early January and used the living hell out of it daily, it's been my go-to device, and it's not been treated with kid gloves, shoved in and out of pants pockets, dropped, slid around on car seats and cupholders, etc, and had to deal with hundreds if not thousands of atty changes in that time.
Installed a Varitube 14mm low profile 510 and it's been fantastic since. Having a floating 510 is a huge plus, and having stainless threads just makes operation so much smoother.
The Cloupor Mini II needs a stainless floating 510, no wake-up delay, a few more watts to drive the plethora of sub-ohm tanks on the market better, and mayhap a working version of temp control, in the same basic package.