It works and works well BUT best if your dog is at a steady trot.
Thing is, doing this type of training with a motor can be taken with a very dim view by some, especially the law and I suppose their's good reason, fecking idiots going far to fast, or pushing the dog far to hard and taking their eyes off the job and hitting the dog, maybe the dog spots sommat on that quiet country lane and turns sharpish in front of the car.... A million possibilitys....!
The best option is you run with it yourself, or get a bike, that way your doing both of you some good and you'll enjoy that quiet co