I purchased my glasses about 2 weeks ago and after getting them in noticed that they were tight on my head and caused me headaches from the pressure. I went back in a few days ago and the girl did everything she could to get them to be more comfortable, even changing the nose pads. After 2 more days it did not seem better so I went back and the gentleman noticed that the size was likely too small for my head and recommended a larger size. After finding the pair he processed the exchange and refunded the difference. While the new pair are being made I will keep using the originals. Great customer services, stick to the "30 day satisfaction guarantee" and very helpful staff.