There's not too much info out there about these cameras. I've been looking into the Arca-Swiss M-Line 2, which is similar. Lenses are the big issue. Aside from the Schneider Digitar 28mm (a retro-focus design with so-so optical quality), the widest view camera lens that will work with these types of systems is the Digitar 72mm (and even that may not work with some, you might have to go up to something in the 90mm range). That's a pretty big gap in focal lengths, and the only real option is converting medium-format lenses. I don't know much about the Rodagon lenses that Horseman is offering (I'm guessing they were designed for video?), but the image circle on the 60mm isn't very large, and it's still not wide enough.
I'm trying to find out which MF lenses will work with adapters, that are actually sharp enough for modern DSLR's. I need to have something in the 40-50mm range for a system like this to be useful to me.