i don't have any first hand experience with those, but i will say that they had one at a local store, and it was over an established reef (i think it was a 46 bow and it was a few years old), and all they had in it was softies and
lps.
that may mean absolutely nothing, but one of the alleged great features of those fixtures was that they could simulate cloud cover and other lower light situations, just like a normal day out at the real reef. unfortunately, cloud cover does absolutely nothing for photosynthetic creatures.