I love these, like many of the products Philp Reed Games makes they are beyond useful for solo gamers to use something more than charts and to also mix up possibilities for events, also great for low prep games for hexcrawling or just for something to happen without rolling or without having something made up in advanced. I have the Deck of Old School Encounters 1-3 (just downloaded the third set but they look as great and useful as the other two sets) I have used set one and two several times, take a bunch of cards you want or think would be good for game or areas you will be going to and draw them as needed, if you are a DM can do it in advanced and keep it a secret or do it in front of everyone or even get the players to draw to see what they got themselves into.

The art is really fun, and the deck is any easy way to put together encounters. Each card has a situation or temperment given in a a short description on it for the encounter that you can use or ignore. I like the way some of them encourage an unexpected and diverse range of reactions besides those leading to combat. Selecting cards can be a great way to think about what could be found next by your party.