Great coral food and many have said that their mandarins seem to like it also.
We did a single buy for our club and distributed it at a local meeting. We purchased it from Premium Aquatics. packaging and such was very well done...it all arived completely frozen solid!
I got some at Barrier Reef a while back. I think it is the nutamar, but I am not sure. All of my fish go nuts over it. Even the pipefish. IMO, it is such a small particle that it seems like it should be good for feeding SPS as well.
I either break it on the edge of the kitchen countertop, or use my fragging shears to cut the size piece I want. Breaking off huge chunks is a problem with any food that comes in a single brick.