I absolutely love my Koopor Mini.
It has TC, it has stunning looks, it's well built and it's really cheap. If something would happen with mine, I would get another one in a hearbeat.
Plus, I really, really love the extra weight it has, compared to other single 18650 mods. The mod, plus battery, plus TFV4 full of juice, weighs in at solid 313g.
The later, obviously, can be seen as con by some.
One thing I could complain about is the firmware upgrade procedure... it requires a special tool, which they've sent out to some vendors/wholesalers. There is one company in UK currently. Then again, it's not like I want/need to update, I suppose. It does run Ni and Ti coils, which is all I really need...