It's very good. If you don't want to spend that much money then stick to our coffee which is less than $10 and have a cup of that whenever you feel harsh hunger kicking in. It will curb your appetite nicely.
The 2 best cheap calorie free appetite suppressants are black coffee and carbonated water.
Red Burner does work very well though and is definitely worth it imho. I have a hard time dealing with cravings sometimes and it kills them nicely.