We never used the To Hold option. Users would Ilink Update unintentionally modified objects. In WC if Pro/E tries to modify something you get and option to set 'Read Only' this creates a WS lock and avoids unintentional modifications.
WC is much better at Check-In in that it only tries to checkin related objects, maybe even those that are checked out, not sure yet GoLive for us is coming up soon.
