I have a 2003 Honda Accord with the Graphite Pearl (a fairly dark metallic grey). I have had the car for only 6 months and plan to experiment with several products until I find the "look" that does it for me. I tried Poorboys EX on it first and was pleased with it. Next I tried AIOx1 and SGx3 on it for the winter. A month later I added S100 and definitely liked this combo. As soon as it warms up I am going with S100 SEC and S100 wax.
My gut feeling is that I will end up using the AIO, SG, S100 combo and continue topping with S100 about once a month. I love all 3 of these products for looks, ease of use, price, and durability.
I really like this color. It has enough color to give it some pop but does not show dirt and tiny imperfections quite as quickly as black and red. Another words I can clean up my car and it will actually still look great to me after a couple of days. With black I was never satisfied after driving for more than a few miles.