Everything right out of the box.
Only item that has to be adjusted was the video card (GeForce GTX 260) wasn't running optimally till I installed the drivers for it using the Driver Manager.
Haven't found a thing
Really impressed how my system performed right from initial installation.
I am dual booting with Windows 7 and this is now my preferred and default OS on my system.
If it wasn't for Office 2013 not running in WINE I would completely get rid of Windows all together.