I've had HID bulbs in my 2002 bugeye for over 3 years now. WAY better than stock for light on the road. I'm sure it throws more glare, and I've had to replace my stock fogs with Hella H500 driving lights since I no longer had high beams, but I have no desire to go back. My wife has a BMW 325i with the factory HID lights, and this is as good, though I am fairly sure other drivers might find it somewhat glaring. I never seem to get folks flashing me to lower them, so it must be OK...
And the only installation note is that I had to be sure the ballast was not electrically connected to the body of the car. This was the Eaglelight system from the 2002 group buy.