Purchased for MT-09, tested with a 6.7-inch phone in a rugged case with plenty of room for an even larger phone. Up to speeds of 160 km/h, which was tested even on quite bad roads with potholes etc., I didn't have the slightest movement. It loses a star because the mechanism never really locks and theoretically if you press the tabs, even when locked, it will open the case to remove the phone. Essentially, this will never happen while riding, but it leaves you with some doubt that it might happen in the future due to wear or failure. I will return for possible updates
