The results look good. Most of the products you can't get outside of USA/CAN I believe, but what I plan on doing is wet sanding mine and then buffing with polish (once I get a dual action buffer). It will work like this one in the respect that it'll remove all the oxidization and make the plastic taillights/headlights look brand new.
I find that cars with yellowed plastic just look much much older than ones without. Fortunately for mine, I've got glass headlights. Only thing I've got to worry about is faded black trim
There are, however, off-the-shelf headlight restoration kits for sale.