Why is this service better than using photo sharing sites, or document sharing services from much larger companies?

FairSplit was specifically designed for the tasks associated with a move, estate division, downsizing or divorce where people need to decide who gets what, what can be sold, donated, etc. You could use a combination of the well-known sharing services, but it would be cobbled together and not so easily shared or restricted by user access, with limited permissions. You can co-brand this with your logo and company information.