Undoubtedly an excellent program to synchronize and as a player I bought it a first version with code then another with a stick.

They are about 10 years and I find that I use K5 "great" from all points of view.
Soon, though, I require, upon payment, the secret code that will allow me to be able to manage all its special features. Thank you for having made available a tool that important and useful for those who delight in one of the most beautiful things in life "music." Hello

K5 use for about 10 years,, amateur and would not trade it for any sw, I have tried others but this is and will remain the number 1.

Excellent program - complete
also it works with a lot of youtube mp4 format used.

It's a fabulous program with various devices with a warm greeting