My youngest had/has a hemangioma on the right cheek. She had 3.5 months of oral steroids, a steroid injection, and two plastic surgeries (at 11 months & 2 yrs, 4 months). She is now 4 years old, and needs some laser. She will always have a scar, though I don't think things would have looked better if we had waited (though the doctors in this area wanted to wait until she was 4 for surgery).
However, it really depends upon your child's hemangioma/situation, plus what you want to do.