I have a "new" (08 left over) GT. I hesitate to get on and talk about how "trouble-free" it has been, just because I haven't had it that long nor put that many miles on it yet. Not to mention I already had a problem with one of the brake pad wires!
But the key thing is why
I bought it (and probably why people are willing to put up with some of the issues).
I was never that keen on it's looks (it's ok), I'm not a big BMW cheerleader (it's my first one), and I never was thrilled at the discount price (hence the leftover model). But then I rode
it (ended up renting one for a couple of weeks).
It's all about the riding experience. Yes, long time touring bike folks will grouse about the weather protection, the comfort of the seat, the "nervous" behavior, "too much" horsepower, etc.
I come from the sportbike/"superbike" realm (my previous touring mount is a Honda CBR 1000). I consider the GT the perfect combination of a true "sport touring" bike. Ride somewhere far away (optionally with a passenger and gear) and still enjoy the twisty roads. And the motor is totally bonkers! It probably isn't the greatest match for a touring mount, but gives the bike a lot of character and is one of my favorite features. These things drew me away from my "comfort" zone and into a BMW dealership.
The good news is that it's a great bike to ride. Isn't that what it's all about?
I think it is worth some minor problems. As for those with major problems, well, there's always that. Not belittling their problems, but they are very complex bikes. Go to nearly any car/bike board dedicated to a specific make/model and you'll wonder why anybody buys one!
To be honest, if anything has disappointed me reading this board, it isn't problems with the GT, it's the lame dealer experience for so many (more than I expected). I really thought I was moving up the food chain a bit in dealer/manufacturer support, but now I'm thinking it's business as usual. Oh well...