Xenon lighting was, hands down, the best modification I ever made to my car. I changed from a reflector style housing to a projector. Some of the kits are really cheap and are more trouble than they’re worth. The difference between the xenon xtralights hid in my car and the non xenon lights in my wife’s vehicle is significant. They seem to work really well in the snow also, meaning that you do not get that effect where high beams are worse than low beams when they reflect off of the snow if that makes any sense. They are also great on flat roads.
I am really glad that I made this modification to my car. The factory hid lighting puts out about 4300k which is a white light, on the replacements I got 8000k and puts out a bluish color which is completely awesome.