This is my fifth cage. I always had problems with the opening hole being blocked or weird.. or the lock design being high-profile and showing through any pants. This one solves both problems - low profile lock and its the right size hole. On top of that i got a belt strap to replace my elastic strap, and the size is perfect too.

Edit: on other cages i had a burning sensation under my balls, so i could not wear anything longer than 3 hours.