I just installed mine. I got it back in April/May when this thread started but lethargy got the best of me. I saw the package on my shelf in the den and got ambitious.
It was super easy and the only caveats I would add are fairly few and minor. Took me about half an hour except that I couldn't find a 10mm socket.
First, they have already added the 3M double sided tape to the "nut" which goes under the crosspiece at the front, so it is fairly simple to insert a skinny long screwdriver through the nut, pass it through the hole from the bottom and pull it tight.
Second, make sure you have a 10mm socket to tighten the bolt on the forward most bracket. Otherwise you will end up with a box wrench making tiny little annoying movements and taking 10 minutes to really tighten the bolt as the space is quite congested. It would have taken 10 seconds with a socket.
Third, you don't really have to remove anything on the passenger side front, you just have to remove two more clips (definitely remove the large panel covering the front behind the grille). Those clips hold the air intake hose, which is rubber and then you can pull it up and bend it over giving you plenty of room to reach under to make sure your nut is placed properly.
Fourth, be careful with that little piece of wire that keeps the ball in the socket. If you aren't careful it will pop out when you are removing it and it is a bear to find on an asphalt driveway. Tiny and gray. Also, rather than try to insert it upside down, insert the one (forward or back) which is rightside up last. Do the one that will end up being upside down while the other end is loose and you can swing the damper wherever you need to in order to insert that circular pin more easily.
Fifth, when you have everything done, carefully, but with strength pull the hood down. I was afraid there was something I forgot to remove it was so hard to close the hood, but after a few seconds it popped and came down and started working perfectly.
Oh, one other thing, when you are tightening the upper bracket, that goes on one of the screws from the hood hinge, try to keep the double sided tape away from the hood so that it will only come in contact as it is almost tight, otherwise it will shift, but grudgingly if you push the tape together and then tighten the bolt. No big deal, but probably a better connection.
I really like this mod. Certainly not flashy, and most people would never notice it, but it is well built and seems to be of good quality.
Thanks for the instructions.