I do not have a super chewer but I am always looking for new dispensers to put into rotation. My Golden has been using dispensers of some kind since she was 9 wks old.
She is very hard on anything with threads that screw together (kong wobbles break in 8 mo with rotation use). She bats the crud out some things.
As a 6 yr old, she's tried nearly every dispenser on the market. I am always on the lookout for something new to try out.
This is a very interesting shape, she has worked out to pick it up and drop it with curved side down. She is really pleased with herself and spends a lot of concentration time with this dispenser.
Very easy to keep her busy and lean using this. We love it!