I love mine:
I went from an R1200GS LC to my K1600 GTLE for several reasons.
1. The GS was badly affected by side winds
2. The GS felt skittish the faster I went
3. I didn't need any off road ability if I'm honest
4. The weather protection on the GS was ok, not great
5. Handling on the GS was always more acceptable than good, but it is a trail bike
6. I struggled getting a comfortable seat/position
Things I like about the GTL:
1. That engine is a peach, it makes my GS feel positively wheezy
2. Good weather protection
3. Good with side winds
4. Good carrying capacity
5. Batter for the wife on the back
6. Better touring kit - heated seats/electric windscreen etc.
7. It handles way better than it has any right to
8. High speed and cornering stability
9. Gadgets - although most are now available on the latest GS range
10. 250 miles from a tank when touring
11. So many electronics to keep you safe, but so has the later GS, both are good
Things I have to live with on the GTLE
1. The weight is high up, if your shorter then a Bagger/GA is a better choice as they have a lower COG, but have less ground clearance.
2. Stereo is crap, I don't use it
3. I'm still not happy with the seat/screen, but I can live with them and will ultimately replace them
4. The accessory socket can't run and air pump, but neither does the one of the GS, come on BMW, put a bigger fuse in it!
Try before you buy is the key to this. I could not suggest anything else other then the Bagger/GA versions of this as they are easier in car parks, but have less top speed ability and less ground clearance - neither of which are that big a deal on a big touring bike.
If your mostly on your own, also look at the Bagger/GT, if two up most of the time then the GTLE/GA is the way to go.
Toys like quick shift and reverse are not crucial, but they are convenient. I think things like sat nav, keyless, electronic suspension and rider pre loads are a great thing to have and make it a better bike for it.
The only reason I'd part with mine would be to update it for another one either the same or the GA just for car park ease of use.
James