I highly recommend Retsan Koers! I want to thank Retsan for the valubale lessons and his tactics when it comes to close protection.
Retsan has a great and open mind. He didn't give the standard lesson, like a teacher and a student, but he is taking you step by
step and explaining the detail so there is no more question about the lessons. The way he teached and explained is clear and easy
to understand. When i have questions, he always replied! He is not only a teacher but to me he is also my mentor. Thank you very
much Ret! and we'll see each other again soon!