Before you arrive
Book online and arrive 10-15 minutes early. Wear whatever you like - you will be moving around, occasionally crouching, never running.
The briefing
Your game host explains the story, the rules and how to ask for clues. Ask anything; there are no silly questions.
In the room
The clock starts. Search everything, say what you find out loud, and split up: someone on locks, someone on reading, someone on the weird thing in the corner. Nothing needs force.
Clues
Use them. Teams that ask for clues have more fun and escape more often than teams that sit stuck for ten minutes out of pride.
Afterwards
Escape or not, you get the story of how it ended, a team photo and a strong opinion about which room to do next.