I purchased the large version of this leash splitter for my two dogs. Both are mixed breeds, one is border collie/husky, the other shepherd/lab. The splitter was fantastic - it allowed them to walk with freedom to switch places, didn't tangle and was everything I had hoped for. For about 3 1/2 months. Then it gave up the ghost and broke. I had been worried about the connectors, but it snapped in the middle of the bungee, about half way between the D ring and the clasp to attach it to the dogs. Granted, the dogs pull a bit, but given the stated "durability" of this product, I really thought it would last a bit longer than 3 1/2 months. I'll be looking for something a bit more durable next time.