I was looking at my buddys building an obsessions one but i didnt like the look of them. The racks he had looked like they where ruffed up epoxy/plastic opposed to the zen reef is nice,clear, and shiney The zen reef looks more slick to me. I have it on 5/8ths with no problem at all, Its rated for 1/2 inch but positive it could hold as much weight as i would need to put on it. The only issue ive seen so far, is when trying the pull the frag plugs out, you move the whole entire frag rack with it because of the silicone holders . But theres plastic screws for you to take the silicone pad out. Other then that im very happy i got it. Tgc had them at reefapalooza, and passed them up. I payed the same price now shipped.