I prefer simple designs that do not depend only on heavy filters in the pictures. Bad lenses can cause eye strain, reflections and headache when you wear them for hours. A good store usually answers questions quickly and does not hide behind canned messages. I like when they mention whether the fabric has stretch or not, that detail matters a lot. Shipping speed is not everything, but extremely slow delivery is very annoying. If they ignore basic questions or reply with copy pasted text, I become suspicious.
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:
click here
(https://stormgunners.com/index.php/blog/18069/unlock-crystal-clarity-the-ultimate-guide-to-glasses-with-readers/)
In the past I have wasted money on items that looked good in photos but felt cheap in real life. Good packaging and a small storage bag are also nice touches for accessories. I also check if the lenses have any blue light filter or anti-reflection coating. If they ignore basic questions or reply with copy pasted text, I become suspicious. Reading comments with real body photos is one of the best ways to check sizing. For things that I use every day, I prefer to pay a bit more if the quality is stable. Sharing real world usage stories is often more helpful than any advertisement.
Hope this helps someone.