Greetings,
I installed the splash guard last weekend.
The installation is very very and very easy and you do not need to drill
anything. It is a great engineering design from Honda.
The instruction specified that you use a pin to make the center hole for the
screws, I would suggest that after you made the holes, use a smaller size
screw first to make the starting thread for the holes, this will make it easier
for you to screw in the real screw latter.
About how they look "before and after", I think they look great in black
and blend in with any color (By the way my Civic is silver). Somebody would
prefer to have them painted to match with the body color. However, for me
I rather not due to the cost of the painting and beside my tires are black
anyway and I rather not painting all 4 tires to match with my body color

.
Have fun with your do it yourself project
Cheers,
2006civic