Are you sure, More people have ecosystem method that hobbyist keeping SPS coral.
I tried it and it worked ok, the only reason i stopped was that my sump was too small to support my tank load, Maybe the next tank will have MM with a skimmer working at night.
Hollywood fish runs it on the coral tanks and it seems to be working as all the coral look good, the show tank in Mt roskill seems to be going well.
The stuff is ecxpensive to buy, but it cheap as you dont add any other supplement other than calcium/kh buffer.