Mr. Coral has great prices but the disadvantage is that they sell you fresh cut specimens that haven't had a chance to heal. I had a lot of die off on their frags, making them quite small, before they healed up and started growing again. Acans in particular.
Also, they messed up on a few of my frags and gave me a different frag than what I had ordered.... at least 2 or 3 (out of ~15) where NOT the frags I wanted.=/