Finally took delivery of my Q5 a few weeks ago. Four months before, I chose Stratos Blue without the opportunity to see the colour on anything but a 4"x4" paint swatch. Personally, I'm very pleased with how it looks on the Q5. So far it's the only one in that colour in my city, so it's quite distinctive. So far.

 

Nice choice, I was leaning towards the Stratos Blue myself but didn't pick it because of only having the paint swatch to judge by. It looks even better than I would have guessed.