Or is there anyone with experience with any 2 TB drive? Should it work out of the box?
It won't work out of the box.
After installing the drive, you need to boot into Recovery (hold down Cmd+R during boot, it's a partition that's hard-wired into the logic board), and reinstall OS X from there after using Disk Utility (there's a few apps in Recovery, DU is one of them) to format the drive.
Honestly, I don't know why you didn't get an SSD instead. It would have made a world of difference.
It will work fine. in general the only limitation on disks in the MacBook Pro is a height limit and the M9T is thin enough that it's fine.Thanks for all the feedback so far. In the Apple store they told me this laptop supports OS X installation by pressing the 'R'-key on boot and then installing it from the internet. So I think that will work.
My main question was, and is: Will the hardware work? I just can't find proof of anyone having a 2TB drive in this MBP's main HDD-slot. I could sacrifice my DVD-drive for the 2TB drive and buy an additional SSD for the main slot but I've read some horror stories about this setup regarding installation.
So preferable I'll just put it in the main slot, but not sure if it will work.