Mine sounds better since the upgrade according to my wife. Prior to the upgrade she would not talk to me via the bluetooth. Not sure if it has anything to do with the upgrade or if she's just losing her hearing.
I was able to download the upgrade from My Sync My Ride Account. I did a check for upgrades on the site, I think. This does not include the upgrade for the Navigation maps.
It contains files that does the "scheduled maintance" reboot. It has a readme.txt file that explains how to use it. I don't have to re-pair my phone or reload pictures.