Yongnuo YN Extender EF 2X III Teleconverter

[forkie]

Does anyone know anything about these? I was thinking of getting one and can't find any reviews:
Yongnuo YN Extender EF 2X III Teleconverter Auto Focus Mount for Canon EOS Lens and at the price of £130

 

[forkie]

Any one ?

 

[pingu666]

im guessing its a rebranded kenko ?

 

[forkie]

True a lot of people say this and have mixed reviews and say the glass on mkii is on par with canon extender but no reviews anywhere for the mkiii and can only find one place selling so might have to take a leap I think I am trying to get the ef70 200 2.8 is usm ii for the extender I have the f4 version at moment