As a forum owner, you want to give your users as much flexibility as possible. This is one of those addons that fills the void and solves many of the "are we able to ...." questions regarding the notifications system.
We aren't using this with Conversation Essentials, but are with Content Ratings and it works great.
The ability to adjust and customise summarization of alerts is brilliant.
Thank you for this free XF2 version, it is one of the essential addons before I can migrate. Xon is one of the most trustworthy XF developers, all his addons can be installed blindly, as everyone knows: it will work and it is safe.