Has anyone tried coral calcium?

I watched what appeared to be a business journal thing but was actually an informercial for something called coral calcium...if what they say is true, then this is a really good product...has anyone tried coral calcium, or is currently using it, or have any info about it?

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.