I have had several makes of Air Kong toy over the yeras and my dog has loved them all. They tend to be durable, easy to spot in a field of short grass (we have lost many in long grass tho) and the squeaker lasts a respectable amount of time even at the mercy of a dog with a really big mouth! The Air Kong Dumbell, to be honest, hasn't been my favourite Kong. There's nothing actually wrong with it - it does everything it should and the end bits seem to be fun to chew on (haven't tried it myself. But I have a dog with long legs who like to run, and for someone with not much upper body strength (me) one of the Kongs with a string on goes much further for her, at less effort for me. It's just physics.