I finally got my hands on this unit. It saw general release in April, but it only arrived in my FLGS last week. I hope to actually have them on the table soon, but in the meantime, here are my impressions of the minis.
The overall detail and sculpting on these is excellent. As with most Spartan 32mm releases. The faces are great, and their shirts even have the stripes shown in the concept art sculpted on. Of course this is only made possible by the computer aided sculpting process, but it is rather nifty. What remains to be seen is how that will translate on the painting table.