I have 73,000 on my 2005 Roadster and right now (that's the key word...NOW) there's no sign of the glass window falling or any seams separating. I have the canvas type top not the plastic (not sure plastic was available then....) I live in Alabama and it gets pretty HOT down here. Now what I have been doing is paying close attention to water seal, making dog gone sure I get it within soak up area of the canvas. I'll drive the car with the window cracked down some...but never fully down to lessen the baffle effects. But honestly !! 73,000 and no sign of drop out or separation here in the deep south...