It will let you:
-Set Global email alerts for all K2 front end item submissions
-Set email alerts for specific K2 categories
-Send email notifications to single or multiple email addresses
It adds a configuration screen to K2 categories which enables you to specify submission and notifications per K2 category. You can also override these settings in the main notify plugin to set site wide global options.
The plugin settings will also let you include the K2 item in the notification email along with extrafields and provide a link back to the item for quick edit and approval or publishing.
This plugin provides this functionality into K2 with such simplicity either via the general settings in the plugin parameters or by the specific settings in the category window. It was so easy to setup and has worked fine without issue.
I have not used the comment notification side of the plugin yet but am very happy with this plugin.