These are totally awesome and a great resource for DMs. You can show little pictures of the monsters, help yourself and your players track initiative, and have all the info you need to run the monsters right there in front of you, hanging on your DM screen or maybe propped up on the table if you don't use one.

I print these out on cardstock before the game and have them ready. I expect that eventually I'll have a little Monster Manual of my own design made entirely from these lol. They're super awesome and I highly recommend them!