I've never trained a mule, so I can't add anything to this thread.
I heard they were different than horses. When I was training and heard this idea, I decided not to take mules on because, if they *were* different than horses, I would probably ruin one instead of help it. So I stayed away.
Now that I hear the complete opposite, I'm interested.
I did ride a mule when I was younger. Her name was Rabbit and she was such a goofball. Once you caught her, you had to DRAG her into the barn. She would take off with you numerous times and drag you BACK to the field. You would have to hang on and drag her back when she was done. When you got to the barn and tied her, she'd rear up on the wall and be a general pain.
Saddle her up and hit the trails, she was a doll.
Now that I hear that you train a mule how a horse should be trained, I'm pretty interested in persuing that. Hopefully in the next 10 years or so I'll come across someone who has a mule and be able to observe what happens between it and its rider, and then maybe buy one after making an educated decision. I always wanted a mule.