Well, I totally agree it's not going to replace a steadicam on it's own, ever. The weight restrictions and ergonomics make it a very different beast. But I've put together a Movi Epic system that works pretty well. Antons power AKS (Heden/Bartech/Paralinx+) and the camera, and I've got an easyrig 9" extension for long, slow or lockoff style shots. It takes lots of practice, just like a steadicam, and the shots it produces look different than a steadicam. I've got balancing down pretty good now too, between 5 and 10 minutes at the most.
We've had it out the heli door at 100mm, and out of an open vehicle doing 100kmh, and it held the shots well both times. So it's got it's purposes. It's much harder to accurately hold a frame so far, since it lacks the direct contact control you have on a steadicam. Pretty cool thing tho.