As a professional wind-screen technician, working for Carglass in Belgium, I use this device 5-6 times a day and I have to say it works absolutely great. I even prefer using this device, to having another person helping me placing the new windscreen. It gives you absolute control every step of the positioning-proces, and is very fast to install (a trained technician sets it up in under one minute). I wouldn't want to change back to previous methods. Looking up this device in my free time, should say enough!