Have uses the bodyguardz before on two iPhones and quickly appreciated the need to be meticulous in prep/application. I use the gel for application and also did it in a steamy room. I also applied the gel very liberally.
Not sue if/how they could make it easier to apply but the need for extreme care when doing so is the reason it doesn't get 5 stars. Once initially applied it took about about two days before all of the blemishes disappeared.
So far very pleased and would use again.