Amazon Customer 5 I have bought the 500g, the 200g, and the 50g MosoNatural bags before.The 75g works just as great.Pros:-Can be reused many times.-It's natural.-No restrictions where you can put it as long as there's nothing that will damage the bag.-It's small and good for small areas.Cons:-It would be nice if the bag could rejuvenate not only by sunlight but by other sources of light. Some countries don't get much sunlight.Overall it's pretty good.