At 30,000 miles (48.300 kms) my 2007 R1200GS runs perfectly. Uses no oil, gets good fuel economy and has no problems. There were a few issues with the way the engine was initially setup, the valves on the left cylinder were set to no clearance. The dealer never resolved things, I identified the problem and fixed it myself.
Two recalls: one on the brake lines and one on the EWS antenna ring. Both handled well by the warranty. Initially my fuel gauge didn't work properly but the dealership replaced the sensor strip and all is well now.
At the 600 mile (1000 km) check, the mechanic set the rebound on the rear shock to the middle of the range which made the machine handle poorly. That was resolved when I replaced the factory suspension with Elka Suspension (from Canada).
Other than a few harshly handled issues by the mechanics at my local dealership, my bike has performed wonderfully and works well. I've replaces the tires several times which is expected. I perform maintenance on a handful of these machines for friends and the machines have always been easy to work on and no major issues or problems have occured.
Overall I'm happy with this machine and expect to wear it out before I replace it, that should take another 10 years or so...