It's great for if you need to take screenshots and then annotate them.
I like that you can choose each time you create a screenshot what to do with it and where to edit it.
You can specify what region to capture (window / screen / just an IE window, etc.), so if you use multiple monitors, you're not constantly cropping your screenshots down to what you actually wanted to capture.
There are a ton of annotation options, plus you can decide if you want to capture mouse pointers with the screenshot.
The software will send the screenshot to a number of different programs for editing or embedding (Outlook, Word, your clipboard, your printer, etc.). You can set a default preference for this OR choose dynamically each time you are working with a screenshot.
I have an issue with this software and the "Snipping Tool" that is included with windows essentially "fighting" over the Print Screen functionality on my system. I with there was a way to change the hotkeys for that command. If there is, I haven't found it yet.
Go for it. I have really only had good experiences with it.
1) Support to users-- this allows me to take screenshots when creating instructions for users that are having issues with our ERP system and lets me annotate those screenshots to provide the clearest instructions for data entry.
2) Meeting audit requirements - Anytime we make changes to the ERP system, we much document through screenshots the changes that were made. This software makes that simple.