I have a glass coffee table and my storm door is all glass . . I've always thought that neither was reallly clean and I've tried EVERY window cleaner available, used soap and water, used soap and water and vinegar . . . And then a restaurant I was in was using these cloths -- I got some. Wet one and wipe down. Come back with dry one! I can't believe how clean and clear the glass is with just water! I got 4 for $10 and they're supposed to last 500 washings! Way less than I'd spend on glass cleaning products!
If you have a lot of glass to clean, I would recommend getting some!
They are very thin and do not have any texture - almost like a "paper" towel but yet you can wash them. They are definitely different than my microfiber cloths (which I've been using for a long time -- great way to save money!)