I like these they are very pretty and fit over my small eye glasses perfectly, no slippage, not heavy, very comfortable.  They do appear cheap, but I have three pair and they have all held up nicely.  None of them broke.  I did lose a pair but wasn't too upset because of the price.  This really beats buying prescription sunglasses, and having to change from regular eyeglass to sunglass constantly, and risk dropping or losing your regular glasses or even the expensive sunglasses.  I wear progressive, ultra thin eyeglasses so I need to be careful with them.  They cost between $500-600.  This way with the fitovers, I do not have to remove my eyeglasses.  I have about 8 pair of fitovers, keep them in cars, and different purses.  These are my favorite ones.  I have the tortoise brown color.  All of the fitovers that I own seem to be of the same quality.  My eye doctor also sells them, but I haven't looked at them to compare the quality and price.  I highly recommend these, I will never buy another pair of prescription sunglasses.