What was the process and difficulty level?
The whole bootlid has to be taken apart.
There is one screw by the handle you use to close the lid, the rest of it is clipped in place.
You also have to remove the plastic pieces by the rear window, since they are attached to the big piece.
6 or so nuts that run across the middle of the lid. (You can see 2 of them in the middle of the next picture)
Then you can pull the part that the Subaru badge is on off, the part that runs across the lid on the outside (alsp shown in the next picture)
This is made of plastic, so it can be bent a little bit without damaging it. It is also clipped in place, just pull on it untill it comes off, i found it easiest to start at one corner and move to the other side, also pull it a bit down towards the ground and away from the car, since the clips is on a bit of an angle.
When that part is of, you get to the 6 or so philips screws that hold the chrome thingy in place.
It is not that hard to do, does take a little bit of time, and I was a little afraid of braking something the first time doing it. I would say it is as easy as taking of your front bumper.
Hope this helps a bit, if you have any more questions, just ask away.