Wet n Forget is basically a product with a specialized formula to optimize in moss removal from pavings and outdoor areas. My mum uses it on our little outdoor area at home to great effect. This particular shop is a small one(I think there are 3 across Auckland in total). The lady that we got it from most recently was absolutely lovely, she was happy and smiley and gave us some general instructions on how to use the product — it seemed like she genuinely cared, which was nice. The products themselves are quite pricey, but you get what you pay for I guess. And because it is a special, unique formulation, it works.