I just realized I never got around to responding to this thread. I have mixed feelings about these. I've had 4 of them (two still in the tank) and I think they have a lot of potential used properly, otherwise they're kind of a waste. Out of the gate they look natural and nice, but you've got to plan properly if you want to keep them long-term.
First off the magnets are amazing, but the quality of the frag slots is spotty at best. Of the four pieces I got, I think most of them had at least one hole that was unusable or at too severe of an angle to be used without gluing the frag in. At which point if anything goes wrong, you've lost a spot. Which brings up another issue, they drill for both sections of the plug (top and bottom), so that it sits flush. Which is great in theory, but it makes attempted removal of the plug VERY difficult if it starts to grow out at all.
Also, be very careful to think about selection of corals, because the way these things are designed, stuff on the top tier is pretty quickly going to shade stuff on the bottom. Even just with zoas, the bottom portion will become useless unless the bottom frags branch out.
So if you're going to get these, I would suggest encrusting stuff or small polyp zoas for the top section and acros for the bottom. I would like these more if it were just one long single row, as opposed to two. And the quality control were better.
Here is a recent full tank shot of the remaining ones in my tank on the top right and left.
Here is the left one now with most stuff closed up. The goni is ok with low light on the bottom and the alveopora doesn't mind partial shade behind my return either. The encrusting monti on the left I stopped loving, so I glued some GSP over it since I'll never be able to get the original monti plug off.
Here on the right I threw in the towel on the bottom row because my leather reaches up to touch it (as seen in the FTS) and the zoas/palys started on the bottom and worked their way up, shading the bottom until they died anyway.
At the moment I've started getting more reef rax, although his stuff leaves a little to be desired also.
I would get these if you know you can plan them out very well, and know what you want in the position longer term, and get yourself a proper 3/4" drill bit to fix the holes that are going to come in lost. If you're not going to do all of those things, and enjoy changing your tank up every couple of months, these things are potentially going to be a waste (I got 4, 2 are still in the tank, one is dry in a cabinet, and one I just took bolt cutters to so that I could salvage a goni that started encrusting and an encrusting cyphastrea that was getting stung by it).
www.reefrax.com
