The manager in our shop had me build him up a rear fixed hub for his Trek District so he could run fixed/belt-drive, Gates center track, just like this Renovo. But fixed, not freewheel. It's his townie bike with a front rack, kept both brakes -- he does not do mad skidz with it, but does tend to brake via backpressure vs. using the actual brakes. So far, it's held up just fine with regular commuter use.
I don't think belt drive is all that, however. Limited gear ratios, expensive, need a special frame to accommodate, belt needs to be within a certain tension range to work correctly... It does have all the benefits it claims: silent, nearly maintenance free, clean, etc. Just that the cons outweigh the pros, IMO.