Love it! There's no better way to learn the rule sets without playing the actual game than from these instructions they have...which they give out for FREE! You don't even need to purchase the game to read the entire rule set which I think is crazy, but I'm not complaining.
If you're playing enough pinball irl then these things can be a great help. They're not going to make you that much better at being a pinball player, but they will help you with strategy and game knowledge for sure!