bazaar shared repository advantages

1. Except for space saving , does the shared repository have advantages compared to stand-alone? for example , can i work in the following way :

3 developers , each has local standalone tree and bind branch as a backup in network. the gatekeeper is merging from the network locations of all users and push the released version into "FORMAL VERSIONS" repo. the "FORMAL VERSIONS" repo is also standalone tree

NOTE : i have it in a n开发者_运维知识库ice drawing , but i cant attach image to this forum yet...

Thanks from advance Gil Idelson

Shared repository required only to save space of history storage if several branches have common history. Another option to save space could be usage of stacked branches, when new branches stacked on the some stable branch (trunk).

Also, one can run bzr qlog /path/to/shared-repo to get the log for all branches in shared repository in QBzr GUI qlog.