I used to train Schutzhund dogs - many many years ago. Mallinois are great dogs, very smart and attentive. Just be sure you are prepared for what you are getting into. These dogs need LOTS of activity to keep them happy. These are not dogs that will just lounge around every day and be content. They need something to do - or they will find something to do. 9/10 times you will not be happy with whatever it is they find to do on their own. Good rule of thumb, unless you are working them constantly (Schutzhund, Agility, etc.) you need to be running them several miles a day.