Felicia 
2012 BMW 6 Series Convertible 650i 2dr Convertible (4.4L 8cyl Turbo 6M)
Always will own one
 Second 650i convertible owner.  I'll own them as long as they make them. (which, unfortunately, ended Feb of this year).  For a convertible, there's less road noise then a hard top, sound in speakers is great, going 80 feels like you're driving 40, no squeaks or leaks in the roof.  This car is a 2012 with zero issues.   As any luxury car, you can expect a high maintenance bill, but don't get one if you can't afford it.  Just make sure you take it to a BMW dealership and you're covered.  Warranty does cover any electrical and mechanical issues - anything outside of wear and tear.  The only thing to watch for is the convertible.  My last one (I was 3rd owner) had a big top stopping mid-way issue which, although covered by warranty, they wouldn't cover until it was "adjusted", which came out of my pocket.  When I asked "what the *** is an "adjustment"?  they told me it was the responsibility of the owner to "adjust" the sensors before they will repair anything.  I told them being the 3rd owner, how was I supposed to know this?  Where in the BMW manual does it say this?  Arguing with a warranty company is comparable to banging your head against a brick wall, so I ended up having to pay $900 out of pocket for something that failed, AGAIN, a few weeks later, that, yes, had to be fixed, which I had to pay another $300 for the warranty deductible, but they did fix.  I still don't understand what happened, but be weary of that.  (side story: I'm also a lifetime Miata owner/fan with 3 under my belt.  I'm an original 2004 mazdaspeed owner and not once has that car been in the shop - lesson?  The more electronics you have in a car, the more problems you'll have)  Anyway, back to this car, since the 2007, the 2012, has definitely fixed a lot of its electronic glitches and what appeared to be transmission "jumping" in my 07, is now gone in my 12.  The newer models are a lot less frustrating and way more user friendly.  And VERY fast.