Overall, we're very happy with the windows. The only significant issue we have is that the south porch window wants to bow out. I ended up putting a screw in front of it so it will stay in place. We will probably have to put a 1/4" shim on the bottom to get it t fit more snugly. Also, in hindsight, we should've put mullions on both the north and south windows. They are quite large, making them hard to handle and store. If we had put a mullion on them, all of our windows would have been about the same size. That would have greatly simplified off-season storage. Live and learn I guess...