If these bags work as well as their customer reviews at the other site say they do, they may provide a good compromise between the two problems of produce storage: Produce stored in closed containers, including plastic bags, rots. A lot of produce stored will dry out if not stored in them. You're right in your later posts about tomatoes needing to be kept on the counter; chemically, the taste of tomatoes is ruined by refrigeration (so of course it's best to buy tomatoes that have never refrigerated), and about mushrooms. Again, for chemical reasons, they keep best stored in the fridge in a paper bag, in layers on mushroom deep, with paper towels between the layers.
They are definitely exceptions, though most produce is best on the counter rather than in the fridge--and it goes bad fastest on the counter, too. Green Bags are advertised (and positively reviewed) as being effective on the counter, too. If they really eliminate or reduce the ethylene gas that is one of the things that cause rot, then they should work to some degree, perhaps allowing produce to last as long on the counter as in the fridge, so less flavor is lost. I don't know, but I"m going to try them.
One other thing: Not storing food in plastic bags does not eliminate ethylene gas. Most people store most produce in the fridge, which means that, even without individual containers, it's enclosed in plastic drawers...
I'm going to try these. If they don't work, I'm a $10 sucker. If they do, then they really pay for themselves the first time I use them.