Didn't do much for me. I tried a few different things and they were mostly a waste of time. I did recently pick up the Sylvania restoration kits and that shit was like night and day difference.
The only trick is that their "3 step" process is bullshit. It's a lot of sanding and cleaning and sanding and cleaning and before you know it you'll be on step 12 of 3 and only halfway through. But it works and the difference at night is definitely noticable.