I did this about 7 years ago -- as far as I know the big 3 vendors get their pads from the same (one and only) supplier. The quality was excellent and as noted the windscreen frame, etc needs to come off to get at it. Good time to replace the rubber seal between the screen & body.
The install is pretty straight forward -- thoroughly remove the old stuff, position and lightly cement the new -- not much glue/cement is needed for the top pad as the windscreen clamps it in place once it is reinstalled.
You may want to search the archives for the challenges and solutions people encounter removing the windscreen -- some lift right out, others require a nuclear warhead at each corner to get them loose.