I personally like the weathgrass tray grow on the stacks, they are using soil in the net pot....water looks clean!
They seem to have a decent filtration mechanism but I think it looks overpowered on areation, look the video and you can see a gayser coming up from some fish tank.
Most of the plants in the video do not look particularly good, potassium deficiency on basil, cuccurbit not looking great either, root/stem rot and dumping off desease, many plants looks stretched and yellowing leaf is abundant.
I think the video has beeen taken when it was still a young system, you can obviously see the DWC raft have not been drilled yet.
WEB
http://www.rhibafarms.com/project-aquaponicsVIDEO
http://player.vimeo.com/video/14033417