I bought the BMW R1200 GSA brand new on the 1st of March, 2008 after a lot of soul searching. I'd recently owned a Honda VFR 800 (pre-V-Tech) which is often reported to be the best bike ever made. It isn't - the R1200 GS Adventure is!
It took me a few hundred miles to settle into the GSA - make no mistake - it's a very tall bike and it carries a lot of weight high up when fully loaded with luggage and a full tank. This weight soon disappears once you get moving but it can take you by surprise when you have to stop again.
I initially removed all luggage, set the ESA on single rider comfort and made a point of never filling the tank above halfway (there's still more range than most other bikes on a full tank anyway) and this did the trick. Having covered a few miles I'm much more confident now.
I'm delighted with the way the bike goes and handles. It's simply a pleasure to ride and although it may not be as fast as the VFR, I believe that I can travel faster on the GSA than I ever could on the VFR. I say this because the BMW just seems to handle anything I can throw at it and never seems ruffled. The high riding position gives a fantastic view of the road ahead while the screen does a great job of keeping the wind blast off. I recently rode 350 miles in one go and it was fabulously comfortable.
The boxer engine is super-torquey and delivers a good punch from any revs. There is a bit of vibration at higher revs but it certainly isn't intrusive. I've even done a bit of gentle off-road riding on the dual purpose tires. My only negative is that it's a big, heavy bike to move around at very low speeds or around the garage but if you can live with that I don't think there's anything else in its league.