So you're in a conference call with a bunch of co-workers, and someone says that you never sent him that email about a client. You open up X1 and search for emails, plug in the first three letters of your name into the FROM column, the first three letters of his name in the 'TO:" column, add the name of the client in the search field, and all related emails sent from you to him pop up in a list. So you say "I see where I sent you that email June 18th at 8;32 AM. Let me forward another copy to you." And from within X1, you click on 'Forward" and re-send him a copy of the email.
I used to sort and store all incoming emails by topic, but sometimes you can't decide whether the topic is 'Sales meeting issues' or 'AT&T Projects'. Now I don't move any emails to special places. I just mark them read, and if I need to go back to them, X1 finds them in seconds.
My company does not pay for this product. I paid for it out of my own pocket because I know it will save me hours of time each year and lots of frustration trying to find things in my PC. And it's the only App I pay an annual support fee for because when it crashes, I NEED to get it running again. Review collected by and hosted on G2.com.