Bad lenses can cause eye strain, reflections and headache when you wear them for hours. Cheap frames can look nice at first but bend easily or become loose after a few weeks. If they ignore basic questions or reply with copy pasted text, I become suspicious. In the end there is no perfect shop, but some stores are clearly more consistent. Nobody wants pretty shoes that hurt after ten minutes of walking.

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=https://rentry.co/20484-my-honest-review-cinily-co-uks-vintage-frames-for-prescription-golf-sunglasses]
see more details
[/url]

Now I am more careful with impulse buys and limited time offers. I do not trust only the star rating, I like to see detailed photos and longer comments. Sometimes I do not mind waiting longer if the price is fair and the quality is solid. Many times I avoided a bad purchase just by reading a few careful comments. Each material has advantages and disadvantages depending on season and activity. It makes it easier to compare with an old pair of glasses that already fits well. Metal can feel more premium, but acetate can be more comfortable for long wear. Taking a few minutes to research before buying can save a lot of money and frustration.

Hope this helps someone.