I have one,
Pros : it is light and comfortable. It has a very nice visor for eye protection from wind and insects when riding at high speeds .It has an integrated red led light (at the back) which is rechargeable through a micro usb port and an fold away rain cap (in a little pocket thing) , as an option you can buy clip on era muffs which are useful in cold weather. Most of all it is reinforced to conform with speed pedelec regulations in some countries in Europe. very comfortable.
Cons : It is expensive but