I have not tried it, but Todd said that since Blackfire was planning on shutting down, they stopped producing all of the products and are now working on getting them all back up and running.
PBMG recently acquired the Blackfire line and is the manufacturer. Other sites that may carry it have left over stock from the previous manufacturer. The crew is working non-stop at getting everything ready to go and production is underway. Please check back often as many exciting things are planned. For now our energy is making that we have everything you guys (and gals) want.
As far as the product itself it is a light cleaner with protective properties. If you are looking for a more aggressive product (to remove haze and fine scratches) consider Diamondite Clear Plastic Enhancer and Clear Plastic Restorer.