I installed a set of SKS fenders last weekend. It wasn't too bad, but it did take 3 times longer than I thought it would. And that was on my old Klein Performance bike that has lots of clearance and eyelets.

If the VO instructions are like the SKS instructions, you need to realize that they are for illustrative purposes only - you can't really install fenders that way. Since the fenders are supposed to fit lots of different bikes, you can be sure that you'll need to improvise to get them on the bike, and you'll probably need hardware that you don't have.

I had a problem keeping the fenders straight. Every time I tightened the stay bolts the fender would twist because the left side rotated up and the right side rotated down. So I adjusted and adjusted and adjusted. I finally gave up trying to get the fenders to match the radius of the tire after messing with it for a while. But, the good news is that they work pretty well.

Anyway, this post is worth reading.