I have used it. I would rate the product a little above average. Easy to use, last seversl months and gives a good finish. I used the metal polish and QD also seem to be on average. But their are better products out there like Klasse AIO.
I have used Finish First several times and have been very happy with the results. I bought mine from the guy that makes the stuff when I was at the Myrtle Beach spring motorcycle rally, He told me to leave the polish on for at least an hour before removal for the best results. I have left it on my bike for several days and there is no trouble removing the product. He told me that he puts it on his bikes in the winter time and doesn't remove it til spring. It does look very deep on my black bike and feel satin smooth after removal.
I would use Finish First on my bikes all the time if I didn't keep buying other products to try everytime I come to this forum
I use their Metal Finish Polishing Creme and their Window Finish...all good products as far as i'm concerned. Try www.seeitshine.com for decent internet pricing.