Anyone out there have any experience with MMLR (man made live rock) in any of their tanks?

Recently had a particular piece designed for me, but I am very hesitant to put it in my DT.

It is a reputable person, with a proven track record with making and using MMLR with no issues. Yet I am still a bit worried. It was kept in the makers tank for I believe three weeks. I have had the piece in my frag tank since the swap.

Every thing seems okay with it. The water tests out good. pH slightly low like a .1 or .2 low but thats it.

I have great faith in the maker, I guess I just need some assurance that everything will be fine with no problems.