I can't tell you what Metis will be for you, but I can tell you what it was for me. Metis is one of the most challenging things I have ever done. During my first project I said this. "An Ironman triathon is so much easier than Metis. In Ironman, after 15 hours you stop - good or bad. You can go 15 hours at Metis and still have something that doesn't work ... but you just have to keep going!" My point is that Metis pushed me to find things in myself I didn't know I had. This is an opportunity to be your best self. This is an opportunity to gain experience that will allow you to take on really big problems in life.
Be prepared to: work hard, not sleep, fail, make friends, succeed, celebrate, fail again, question, succeed again, and triumph. To get the most out of it I have two pieces of advice: don't be afraid of messy data (a dictionary is your best friend) and don't let yourself struggle - ask questions when you need. What's great about Metis is that there is a whole team of people, staff and students alike, that are committed to your success. There are 35 people on your side - when was the last time you could say that. Ultimately, I get to make the world a better place every day because I went to Metis. What more is there to say?