Pro-glass has nice formed windows and I installed one of them in the Duster for Glasses. He had some water leakage around the cowl area but I believe it was a rusted hole or so or the fact that I did not seal the Pro-glass entirely with silicone to create the problem. Other than that, it saved a good amount of pounds and looked stock. He even used his wipers on it for some time.
I recommend not using wipers since most of these types of cars are the worlds best weather stations. If it's gonna rain, keep it in the garage, if it's gonna be wonderful out side, the car will be prowling the streets. Visual maintenance: Polish it every so often with good soft cloth rags and plastic polish and the glass will look great.