The workflow involved in launching Grab, taking the screenshot, saving the screen shot, cropping the screenshot and converting it into a JPG, attaching it to an email, and sending, is a daunting thing, and I've been doing it for years.
This makes it....so.....easy. And because the screenshot is uploaded, it's easy for both you and the recipient to refer back to it at any point in the future (as opposed to trying to search through old emails for an attachment).
Don't hesitate to buy this one. I understand it used to be buggy and problematic. I'm new here, but I sure don't see anything like that in the present version.