I had my first training course completed with Mark back to 2 years ago when I knew he was the professional instructor you could find in the country. This year we are planning to join DSEI exhibition with our M4 relevant products which requires all our attending staff members to have good knowledge about M4 weapon system, Mark was the first instructor I could think of for this task. I brought three members to this course on last weekend, and the end of course our goal achieved. We are quite confident to say we have good knowledge about M4 and know how to handle it well now. Definitely will come back again for future courses.