The fact that we are on this site generally means we ride or like the GS. The fact that there are so many people on this site telling stories of faults clearly shows there is a problem. However we can not gauge from this site the true volume as a perecentage of the whole production or even those sold in the UK.
I bought my bike based on the BMW name, the perceived quality and the fact that the GS is billed as a go antwhere bike. I live in a big country with only one BMW bike service center. And frankly what you read here is less that inspiring for someone like me that rides in an environment with often 60 07 70 miles between any kind of civilisation.
The main culprits of failure seem to be well known and there are many threads attesting to the problems. The fuel pump relay appears to have been arround for a long while, yet I read that the componant is still being put on 08 bikes and even the new 800.
I also drive BMW cars, and I can tell you they also breakdown, luckily not always in ways that leave me stranded but they are annoyingly regular, and I seem to have small problems every couple of months.
I've been lucky with my GS, a new battery on the first day of ownership... and a second one after 8 months, frankly not really very good in this day and age, with the sencond one the canbus shut down and only the dealer could get it up and running again.
I have ridden for 32 years and have owned a TS 90, CB 250 G5, CB 400/4, CX 500, C90, Z 200, BSA B31, Sportster 883, Heritage Soft Tail, R 1200 C, and now the GS. I can tell you I have never been let down at the side of the road by any of my bikes, even the 1954 BSA always go me where I was going, and didn't need much looking after in between journeys either. I did have the normal battery problems associated with english winters and 3 year old batteries on my 400/4 but they were cheap and old bateries, not an 8 month old German battery.
What I'm getting at here, is that BMW should at least be takling the common known problems and putting them right. And then making it known that the fault has been sorted, so that new bike buyers known that its sorted.