Having purchased one of these cases three years ago and seen first hand how good it was, I have purchased one for my new phone. The new style of thin, wide, mobile phone is difficult to hold in wet or damp environments, this case improves handling and protects the phone when dropped.
I have been looking for this type of product to protect outside electrical items from moisture ingress. So far, this product is protecting the electrical connections and only time will tell if it lasts a year. It is expensive so time will tell if I get value for money.