Couch to 5K

So I start the Couch to 5K this week and I am really excited to get moving!!  It's been somewhat of a stressful day on the work front....so I'm hoping running will allow me to blow off some steam. Anyways, is anyone else doing or have done the program?  What did you think and what were some of your challeneges?  I'd love to hear your feed back!!  Wish me luck....I'm definately a little nervous about my first bout with running! hehe :)  ~Kendra~