Each trippie is different.
You are seeing the park from different eyes.
It gives you an over view of how the parks can be on some days.
Some posters talk about times for a ride, their thoughts on the park and rides, what they ate and things to avoid.
No matter how old the trippie is, there is something you can find out of them that might be helpful to you on your upcoming trip.
The stickies are very good to read.
They were started with the intention of helping newbies to the Universal parks and hotels.