Going by the experience of my friend, it can be good for acne but can make you pile the weight on. I imagine that it would be different for different people though
I went on it when I was 18 (10 yrs ago) because of acne, it worked a treat, but as stated above u shouldn't be on it for longer than 4 yrs ish.... as it can cause liver damage. Its just a very strong steroid pill with lots of hormones!! Good Luck x