Incredibly useful tool. Like nothing else out there for any other engine - & improving all the time.

The features I enjoy the most:

* Exporting entire accounts for archiving
* Exporting single campaigns for modifying in Excel
* Review/share the proposed changes to an account
* Copy, cut and paste ad groups and campaigns
* Easily make mass additions, deletions, changes
* Add negative keywords to many campaigns easily
* Delete duplicate keywords
* Work off-line