I have had these for a month so far and I have had no bad experiences with these sunglasses. I have dropped them numerous times and they never broke or scratched. I read the reviews and thought that they might be too flimsy for me because I am a mother of three kids and we all know how that goes. They are very good quality and very pretty.  No you cannot remove the lenses to replace with prescription lenses. The fit is perfect they adjust to size by expanding arms.  I will purchase more for my family.