Metal can feel more premium, but acetate can be more comfortable for long wear. Some pieces look shiny online but feel like plastic when you open the package. I also pay attention to return policy and customer service response time.
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:
[url=http://medic.zkgmu.kz/?option=com_k2&view=itemlist&task=user&id=5436404]
visit this page
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Whenever I find something that actually works well, I tend to reorder it later. Good stitching usually means the item will not fall apart after one or two washes. I have learned to avoid items that look extremely different in every product photo. I also check if the lenses have any blue light filter or anti-reflection coating. Many people do not mind waiting if they understand what is going on.
Hope this helps someone.
