BMW editor or AK90

[lidons]

Hello colleagues,
which is best of the three to be able to BMW.

I need one and do not know what to buy?.

I've also read that the AK90 Ews4 problems, this is true?

BMW KEY Programmer

EWS Editor V3.2.0

AK90 BMW Key Programmer

Thanks mates, we would appreciate help from someone who already works with these programs.

[Nierka19]

Somebody know how it works this AK90?