GlassesUSA review: I'm totally confused by the negative reviews I've come across here since I've only had positive experiences with this

I'm totally confused by the negative reviews I've come across here since I've only had positive experiences with this company. I've now ordered 3 pairs of glasses from them and have been totally satisfied with each pair. I did return 2 pairs with their very convenient return policy. Those returns were simply due to one pair being too small and one pair where I wasn't happy with the look on me. Each time the return was easy and a store credit (which I chose over a refund) was promptly applied once they received the return(s). I then simply ordered 2 different pairs. They have always been prompt with their email correspondences regarding the production and shipping process. I just received a pair today in the mail which were ordered with the store credit. Once again I'm completely satisfied, and I love the look! The frames are always great quality, the prescription is always accurate (but I also supply them with an accurate written prescription from my eye doctor) and the packaging is top notch. They do take at least 2 weeks to receive but I think that's understandable since it's an online business and ecommerce must flood the delivery services. I really hope whatever glitches the business may be having, which all businesses do, they remedy them so that I can continue to do get great glasses and relatively inexpensive prices. I am a totally satisfied customer.