Rene lead an excellent class,He answered all our questions, make sure all students was on the same page and kept the class live the entire time. Never a dull moment!! I must say I came away from this 5 day course with the knowledge and hands on that will make me a better level 1,2 and 3 technician in my area.. I recommend this course to anyone that wants to become a Mater Technician in cellphone repair. Rene Amsterdam will lead you there…. Money well spent. Big up Rene, Master Instructor..