2 authentic KFL+
2 authentic R91%
1 Hcigar KF 3.1
1 EHpro KFL+
My order of preference : auth KFL+, HCigar 3.1, EHpro KFL+ and last is R91% !
I was so happy with all these purchases except of the R91%, full of issues ( center pin, 510 connection, screws, fill hole leaks ). I managed to solve all these issues with some tweaks. But for $93 , this is nonsense.
Best value for money is for sure the H cigar 3.1 and EHpro KFL+.... They work fantastic out of the box ... For only 35 bucks !