I had an old pair of frames that had scratched up lenses and I wanted to update them with a new prescription. I've worn glasses most of my life and hate that I end up trashing the frames that tend to be some of the most expensive parts of my glasses! This was super easy to use, and the guide for figuring out my pupil distance was easy to follow. Will definitely use again. Received a new case with glasses cleaner solution and cloth. All within a more-than-acceptable amount of time.