Depends what you consider a pain, all relative of course. The procedure as I see it for the Disklok is:
1, open boot
2, remove Disklok from storage holder (unless people are happy to keep such a heavy item in the cabin?!)
3, close boot
4, place the official protective cover over the steering wheel to prevent lay marks and scuffing
5, align Disklok and secure
Perhaps if you have a lot of free time and do little driving then it might not be a pain....