I HATE the flat ones. In my personal experience I shuffled them for a week and it caused cramps in my hand because they were slippery and didn't handle well at all. These are a dream. CARDS MOLD!! Diamond mold works just fine too.Aren’t the standard or flat mold chips textured? I thought they were described to be “sandpaper-like” or something of that sort. Not enough for your liking though?