That's an interesting design, but it seems like the roller is only there because the roller is there. In other words, if the strings weren't going around their thumbs to get to their elbows, you wouldn't need that rear roller because there wouldn't be so much dead string length behind the saddles. Then, the saddles don't have rollers, so they're possible hang-up points. Finally, the saddles don't have individual height adjustments, so once it's set up for a particular neck or set of strings, just about any adjustment is exhausted. Although, I suppose one could argue that once it's set up for a particular neck/string set, no further saddle height adjustment is necessary.
On the plus side, it's milled out of a big hunk of solid brass, so I imagine it encourages a lotta sustain and articulation. But, that also makes it pricey.
Overall, I think I'd pass on it.