The only drawback of this device is far too long and not adjustable strap. But with him the galley finished setting flashes by trial and error. I was maybe not the right light on the first try, but I have the right exposure at first. This allows me to focus solely on the quality of my lighting, and here it's great! I suggest you watch the video Lozeau, in 10 minutes I knew everything I needed to use it properly.