OMG so this is my first experience with underground public transit! I was amazed at how clean and organized everything was!
It took a little while to get it down but after that it was smooth sailing! Make sure you get the week pass even if you're there for the weekend... if you get there on Friday and leave on Monday it will be cheaper! They you can gift someone your card on your way out. Someone did that for us and it was really cool. #payitforward