I never hand over without testing them and/or coaching them on beacon use.
Are you joking? Coaching them on beacon use? That's like saying you're going to coach a non kayaker on pin rescue at the side of the river, handing them the throw bag and then running a class V for the first time. Beacons aren't for borrowing. If you don't OWN one you shouldn't be going where you need one.
Also after extensive use, Ortovox makes a vastly inferior product. The x1 is ok and the m2 is worse. I've seen them both stop transmitting during a burial.
Spend the money, save a life. Tracker is the only way to go with experience.