The best thing about this software is it gives you peace of mind as well as saves time by eliminating manual processes.
I would say nothing because everything works perfectly! It's easy to use and has helped us cut down our list sizes which was one of my problems before using clearout.io. We had problems receiving emails from clients who were not active anymore and we also received many SPAM mails. Before using clearout.io we used to manually delete these inactive or SPAM contacts but now they're being deleted automatically for me so no worries there.