This is both good and bad depending on what happens.
I like the concept of being able to take your dog exercising while you ride a bike, but I can also see chances for it to be done improperly. Especially when you consider how quite a few pet owners don't think about the safety of their dogs.
Maybe I'm wrong though, if they have this many customers and we haven't heard about problems, does that mean the people who are willing to buy this are responsible?