I was using this to check for a test date cancellation to open up at a testing center that is booked up until January. I thought I was going to have to sit at my computer non-stop for days checking and competing with many other students to find an opening. I installed C4C not knowing if it would help or not. Within 45 minutes the song played to notify me and I thought it was a mistake. Nope, grabbed a test spot in 2 weeks, it was unreal. I still can't believe it happened.