Honestly, and on balance for myself, no. If you have never done this sort of teaching / leadership training before, and you are relatively early in your Scouting career, you will get something out of it. If you've already done a zillion of these sorts of things before, it's just another entry-level leadership course, which are quite widely available on the private market. Honestly, I was bored most of the time.
What is ALWAYS useful, is a commonality of experience with other folks, and the friendships and acquainences you make along the way.