This is one fast bike.  Very smooth, no vibration.  Mine is a 2003 model.  It has a 6 speed transmission, 130hp engine, cruise control, ABS brakes, (the brakes are outstanding, I have never ridden a bike that could stop quicker), heated grips, a 5.5 gallon gas tank (have to use premium fuel) , center stand, easily removable lockable hard bags, adjustable handlebars, adjustable foot pegs, shaft drive and liquid cooled 1200cc flat four cylinder engine (all spark plugs are on the left side).  BMW calls it a street bike, but I consider it a sport touring model.  Lots of accessories available for it.  It turns heads at every stop light. 

After a few thousand miles I wish the handlebars would adjust further back, transmission is clunky (I have on occasion missed 2nd gear by not pulling up hard enough on the shift lever), and timing cover is seeping oil.  Tail light is too dim in my opinion.  I added some LED lights to the rear.  For touring the windscreen is too short.  The GT version has a taller one and I wish I had that.  The wind noise on my helmet is bothersome on long trips.  If you leave the bike on the sidestand for a week or so the engine smokes when you first start it, from oil accumulating in the cylinders.  I try to use the centerstand when I know I am not going to be riding it for awhile and then no problem with the smoke.

On country roads at about 60 mph I can get 52mpg.  On the freeway it drops to 46-48.

This bike handles the turns pretty well.  When I ride with my friends on their Goldwings through the twisties, there is no way they can keep up.  It is still a little heavy for real quick turns and lags behind the lighter weight crotch rockets.  I like the Metzler tires it came with; this bike is on its second set; first ones changed out at 6,000 miles.  Getting more wear out of this second set.  Maybe not driving the bike quite as aggressively.

Hope this helps!

PS.  I have been told that the clunkiness of the transmission can be helped by using BMW's Synthetic 75W140 transmission gear oil.  I will be trying that soon.  Also, unlike my older non-computerized bikes, you will definitely need a battery tender on this bike if you don't ride it every week.  If you have to change the battery you will need to allow the computer to re-calibrate the throttle position sensor.  All you do is turn the key to on, after you install the new battery and before you start it, then turn the throttle all the way open and closed three times.  That just lets the computer know the range on the TPS I guess.  Anyway that seems to be all that is required after a battery disconnect; go riding!

Update after riding it for a couple of years.  Learned by accident that the bike is very sensitive to tire pressure, especially front.  With higher pressure (at max recommended) the bike is a lot easier to handle.  And yes the 75w140 synthetic trans gear oil definitely helped the shifting.  Still sometimes a little stiff going into second but quieter and smoother sounding shifts.