I like how it helps to keep my emails safe from spam, viruses etc so they don't get lost in junk folders or deleted without me knowing about them! The only thing i dislike sometimes are pop ups which can be annoying but not too much more than other platforms out there.
Try cloud mark first before you buy anything because their technical support staff will guide your through any questions you may have with setting up everything correctly (which was easy!). It's been great as far as keeping our mail secure online at home - no need anymore when travelling away using work computers/laptops!!