I will still use them, but they do have their flaws, I dropped two of them on concrete at work, I got lucky an they didn't break, but one of them has the bottom ring coming off the pyrex.
That's exactly why I refuse to get a Provari, thanks for warning us OP
Guess I should make mention
Kanger is well aware of ProTank Base issues.
As of second release - End of April/May shipping Kanger has supposedly addressed the weak threading, leaking issues on Revised release.
Replacement Bases are supposed to be of better quality.
Probably would help if people were not still getting First release product from slow moving inventory at some dealers.
A Protank or Protank2 properly mounted with a Tank adapter will not break the threaded portion.
Unfortunately you cannot use one on a Provari - no ego threading.
Protank and Protank 2 both use the same Base
Discount Vapors for a replacement.
I heard this was a know issue and they have
updated to a stronger thread.
Will probably take awhile for these to
show up in the stores though.