How is bazaar as a version control tool?

We are planning to use bazaar as a version control tool over cvs and svn. So i don't know much about it, Where can i find a tutorial of using it? and compared to svn and cvs what extra features does it provides. And is it worth using for the application with large amount of code to manage?

The major difference with CVS or SVN is that Bazaar is a DVCS (Distributed Version Control System), not a VCS:
see Comparison between Centralized and Distributed Version Control Systems,
and you can see a good feature matrix in this Wikipedia entry.

Any DVCS will require a more complex workflow than a classic VCS, even if you can replicated the "central" repo model with a DVCS:

_{(source: infoq.com)}