Hi NSM
As already said, people only tend to share bad news.
All I can do is speak from experience and that is - I've had four GSs: 2 x 1200 (05 & 07), 1 x 1150 (03) and an old G/S which doesn't really count. I have bought them all new from three different dealers and done above average mileage on all of them.
I know I'm going to regret this but......... I've never had a breakdown on any of them, I've never been stranded anywhere on any of them and never had any issues with my dealers. All warranty work and servicing has been carried out at times convenient to me and at costs I find to be reasonable. Yes, it's that simple and I'm happy.
I use my 1200 everyday for commuting, touring holidays and as the first choice of transport any other time. I clock more miles on my GS every year than I do in my car and wouldn't have it any other way.
I've spent time being relayed with a number of bikes over the years but, so far, never with a GS. I'm not saying it's the most perfect bike in the world, just sharing my particular experience of mine.
The only other road bike I'd consider would be the 990 Adventure but really can't be arsed with chains on my road bikes and don't feel it's any better than the GS.
HTH
MH