And if we're on the subject, my missus originally used the upstairs desktop, and occasionally used the lappy downstairs. To keep her "My Documents" synchronised, we kept the original on the desktop, shared it, then we arranged for the shared drive to be mapped to drive T: on the lappy under her login, and "My Documents" on the lappy was pointed to the T: drive and the T: drive synchronised.
Sounds involved, but there's only a few reasonably straightforward steps and if you want it documented I can - just be prepared to wait a few days.