They don't come with any instructions, but there are some online -
http://www.motoringfile.com/howto/Ae...%20Bodykit.PDF
Then using that and searching on the forum its not that bad. The only tricky part is the front bumper and the moving the fogs, but its just a matter of time. The rear bumper and skirts are pretty easy to do
If you have the time its worth doing it IMO
James