Had this installed by professional installers and it looks great, but the bar that supports the door should be designed a bit sturdier.  Notice that the bar is plumb on each end where it attached so the wall, but if you put a level to it in the middle it is slightly bowed from the weight of the door and causes the door to slowly close about 8 inches once fully open.  This is better than the opposite, but still should not skimp on the main support bar.  The company that installed our other custom shower glass is one of the best in our area and they indicated the same, cheaper grade of hardware is the cause.