It's currently rather windy here...
Hope the forum's a success!
I formerly worked with Guzzis, Ducatis and BMW in a workshop environment. Since getting a GS-911 it's been used on an F650GS, two R1200GS, an R1200RT and my own R1200GSA.
So far the unit has not been used in anger to diagnose any great problem - simply service intervals etc. and the brake bleeding on the R1200RT after I rebuilt the gearbox.
So I'm looking/not looking forward in equal measure to when it's needed to solve a problem!