I've used it, here is a before picture.
This is a pic about 2 weeks and about 4 washes after using the black box.
One thing I will tell you is the "Polisher" Does not really CLEAN very well. I used a buffer with the Polish and the wax. I feel as if I waisted my time. All the time I spent doing this, I could have spent a little more money got me some 3m Perfect-it and buffed my truck and then applied some swirl remover and then waxed it. It will definately make your truck shine, but as far as removing little scratches don't hold your breath. Especially if you are going to use a buffer, I would just go ahead and buy some 3m perfect it for darker vehicles, if they have an o'reillys where you live get it there. My whole family does or has done body work, and I've painted a bit myself. That is the products they use when they buff anything. The black box cost 18-20 bucks. The 3m Perfect-it is $40 a bottle..... You get what you pay for, remember that.