You pretty much have it covered. For a single individual who doesn't ride too much, and doesn't do any repairs, the GS911 may not be worth the investment alone. However, it would be worth having a few friends go in together on one. The usefulness is more than just what you mentioned, especially if you have any issues.
Check out the GS911 web site for information on all that it does. It is really an amazing piece of technology!
PS No, I do not have a stake in the company.