I'm thinking of ordering power 90(beach body)but I wanted to get some input to see if its worth it.Is it a program that should be easy to stick with or is it very hard?I want to lose about 50lbs. and start living healthier.I am already walking on my treadmill almost every day,only drink water.My biggest problem is at night.I always seem to wake up and snack on junk(I don't know why)but during the day(when I'm awake) I do just fine.So would power 90 help,is it worth buying?Thankyou,Jennifer