"Trust, analysis of needs, a proposition concerning the possibility of solving a problem, confirmation, closure. Przemek's calm and velvety voice wins your trust. By the means of clever examples Harun complements the story about the techniques and behaviour of a good salesman. The workshop conducted by him is like sitting in a comfortable armchair with a mug of coffee and a great book. You imbibe every paragraph and do not control time. I recommend it!"