Spike's Tactical Nickel Boron M16 BCG

Just wandering if anyone would advise against purchasing one of these BCG’s or just some general thoughts or opinions. The web site says they are coated by Failzero. Here’s a link:

http://www.spikestactical.com/z/index.php?main_page=product_info&cPath=63_67&products_id=388

Thanks.