I have had my LGT for 2 years and have put this mod off way too long. I used the fm modulator and thought it was good enough for my XM, until I heard a car with factory XM and it sounded better than mine, even though I had modified the stereo otherwise which includes the factory subwoofer; with a 300w Pioneer Amp, Kenwood separates up front and Pioneer 2 ways in the rear. I even paid Best Buy for the install, just $75. OMG, the XM radio sounds as good as my CDs. I can crank the volume all the way and it is crystal clear. I put in the full $85 kit with the GLI. I am thrilled. If any of you are putting this off, DON'T. You won't regret it. (Even though my girlfriend says she can't hear the difference, I sure can ;-)