Jeeeeez, that seems like 5 minutes ago I was in that game, thats silly that was almost a year ago already!! I would highly recommend anybody to take part in this.. there are lots of flexibility options to get a game that suits your timezone/intensity (The game I was in last year had a 24 hour break for one of the rounds if I recall as well.) The game's are very busy but if you can commit to a couple hours a day you'll be more than fine imo, you don't need to be living and breathing the game around the clock.
It was really cool to mix with other players from across the globe and come across completely different playstyles. Honestly, if you enjoy these games, get yourself involved in this!