I myself have been using reef solutions for a while and the jury is still out.
If you do frequent water changes, especially with like the reef crystals, probably don't need it.
I did notice that my corraline faded when I ran out and wanted to see any adverse or better results without it.
My current theory is that because I change 20gal of 75gal once a month rather than the weekly change, I would like to think it helps keep up the trace elements between water changes and the skimmer uptake. But I realize, since I don't test for any other traces, I don't have a proper reference.
Since I have recently have plunged into SPS, I am more concerned and plan to test for Mg now, but other than that........I havn't noticed a change positive or negative using the Reef Solutions. I think the key is water changes. My corraline and SPS grew a lot this last week because I did that monthly water change a week earlier......probably due more to fresh salt than the Reef Solutions.