This is a really excellent upgrade. By wiring the headlight directly to the battery it will increase the voltage to the lights by .2v-.3v, which is significant. More than 50% brighter than stock. It will also make LEDs brighter as well if you've already installed LEDs and would like to keep them. Every Jeep should have this. The stock setup can be dangerous in bad weather.
I got one of these from Amazon in December. Very happy with it. I went with LED lights, but I liked the idea of getting better connectivity direct to the battery and gave me new sockets for the bulbs to connect to (instead of the crusty originals).