Got my embody chair today. It's quite the contraption. I've spent most of the day dialing it in and figuring it out.
It feels pretty awesome though, and I actually really like all the adjustments since you can make it fit you like a glove. I've got a very touchy back, and usually slump into horrible posture through the day and I feel like this is really helping me sit up straight without being uncomfortable.
I got it at a very good price so I was skeptical that it would come in correctly, but it did, and now the big price tag seems well worth it.