I had the Cool Blues in my car (lows and highs) for about six months. I noticed the difference at first, but I felt like I blended in after awhile.
I am now running HeiloLite (sp?) all-weather bulbs. They give me a slightly yellowish tint. Well, yellow unless you are extremely off center of the lamp (like standing above looking down), then they look purple. Kinda cool.

The cops have never bothered me for them. Currently in the high beam spot are a set of Astra 100w clear units. I am extremely happy with my current setup. I may go slightly more yellow after inspection.