Being a child of the '70s who rode my 'ten speed' while wearing bell bottoms, still remembering catching and ripping my pants in the chainwheel more than once, Id never ever consider a front-freewheel system.

The rear cluster is actually a freewheel as well on the FF system. It will freewheel if anything jamsthe chain. Shimano was not blind to the possibility of pant legs ending up in the mix!