Anybody here have cerec porcelain restorative materials??

Hi there, I'd like to know if anybody on here has this dental material in their mouth? If so, has it worked out ok? I am very toxic, though I have no Amalgams I have composites and have been ill since two particular ones were redone with different composites. Not sure what has happened. I have thought of having them redone at some point and possibly with cerec, though it's HIGHLY expensive.

So would really appreciate as much info on this stuff as possible. I have searched on the web and found out about it, but would like to hear firsthand from someone who has had it in their own mouth.

thank you.