Howdy Matt!
Sympodium is a GREAT coral. A wholesaler in LA send me some last year and asked me if I can grow it out for them at the farm. It grows great, is hardy, has really nice color, and seems to react well to a variety of light levels and flow levels.
It is in the Xenia family, but the blue tissue feels more like a sponge than a Xenia. The green polyps are short and bunchy. It seems to grow in clumps.
The only drawback I have seen with these guys is a nudi hitchhiker that came in on a second shipment I got from the wholesaler. Apparently they have a specific nudibranch that eats them. It is almost impossible to see unless you are looking for it. It is large and blue. They can do some damage if you don't remove them. We had to remove 2 generations over a few months with weekly manual inspection and removal.
This coral will become pretty popular, the wholesaler asked me to sell to them exclusively. They buy everything we grow and ask for more!