I used to have a pair of prescription sunglasses, but that was years ago. Then for a while I was able to wear a pair of clip-on sunglasses with my glasses, but I always had to make sure to buy glasses that they would fit on. The last time I had to buy glasses, I bought glasses that came with the magnetic sunglasses.
I love them! Lenscrafter doesn't sell any (well, maybe one or two pairs), so I ended up having to buy my glasses/magnetic sunglasses from Shopko. I wear them ALL the time, and when I have to get new glasses, I'll make sure to buy my glasses/magnetic sunglasses from someone who sells them. I liked Lenscrafters, but since they don't sell what I want (they push the prescription sunglasses really hard), then I will continue to go to other stores that will sell me what I want.
The magnetic sunglasses do tend to get scratched up more, but that's more because I'm wearing them all the time. I will probably get a new pair of glasses next year, and for sure I will buy another eyeglass/magnetic sunglass combo again. They have a keeper in me!