Don here at F4 Customs. Our shield is different in these ways:
Sheds Rain like you have Rain X on it and you can use Rain X if you like
Is highly scratch resistant even when rubbed with steel wool so you clean it with paper towels and any glass cleaner
It is made from High Optics Polycarbonate so it is Optically perfect and won't break like some other materials shields are made from
4 year warranty against any cracking, crazing or de-lamination.
They come in 4 heights, clear or tint and with our without a vent.
You can check them out on our web site at
www.f4customs.com or give us a call at 330-968-4644