My GS-911 is one of the original Beta units. I've used it constantly on the GT as my local dealer and I aren't on speaking terms.
Living in a small town, it turned out many BMW owners weren't happy with the local dealer, and I now find I've got to go looking to see who had the unit last. It's been used on more than a dozen bikes locally. I have offers of cash and reimbursement via the beer economy, but I figured I didn't pay for mine so it's not right to charge for its use. I know at least two independent mechanics have played with mine and have either brought or are buying units of their own. A couple of other owners are looking at their own units too.
Handy tool. If I had too, I'd buy one outright. Ive had it since the 30,000km major service. Now at 111,000km, and as I do my own servicing, it would have well paid for itself the fact that I'll probably buy another K1600 means it'll be used for a long time yet.