Having a tracking number that works on common sites is very convenient. That is why I sometimes leave comments myself when I test a new shop or product. Of course we all have different taste, but patterns still appear in long discussions. Each material has advantages and disadvantages depending on season and activity. Bad lenses can cause eye strain, reflections and headache when you wear them for hours. Metal can feel more premium, but acetate can be more comfortable for long wear.
Everyone has different expectations, but real photos and detailed comments are useful for everyone. For light summer tops I keep to my normal size to avoid a baggy look. Even big and famous brands sometimes send generic replies that are not very helpful. I also started paying attention to how websites display sizing charts for clothing. Over the last months I noticed that some of my favorite items are not the most expensive ones. Sharing real world usage stories is often more helpful than any advertisement. A good store usually answers questions quickly and does not hide behind canned messages. For example, I compared cotton, polyester and mixed fabrics for similar clothing items.