does anyone have any knowledge of PermaStone floor tiles by Nafco? I'd like to put this in my new house but don't know enough about it. It's vinyl 16"x16" tiles that similate natural stone and marble. I'd love to find out how durable it is. If anyone has any info, I'd appreciate it. I like the look of stone and ceramic tiles but I like the cost of vinyl. It seems PermaStone would be a good choice but can't find out any first hand knowledge.