If many different people say the same thing about a product, it is worth paying attention. Recently I have been testing several online eyewear shops to compare frames and lenses. Nose pads that are too hard leave marks and feel uncomfortable on the skin. Online shopping will always have a bit of risk, but experience makes it easier. In the past I have wasted money on items that looked good in photos but felt cheap in real life. 
 
If anyone is interested in real user experiences, I sometimes write short notes about the shops I test.
You can find one of the pages here:

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For example, I compared cotton, polyester and mixed fabrics for similar clothing items. On the other hand, a well made pair of glasses can last a long time and feel comfortable all day. Sometimes I experiment with different materials just to see how they feel in daily life. I also check if the store explains how to measure PD and frame size clearly. Shipping speed is not everything, but extremely slow delivery is very annoying. Sometimes I even measure an existing frame with a ruler before ordering anything new. This is why I like reading and posting on forums and community websites. When every picture has different colors or extreme filters, it is usually a bad sign. 
 
Just sharing my personal feedback.