The ease of use to manage my contacts, calendar events, meetings etc through this software. Also having all my emails from different accounts under one account makes it easier for me as I can easily go back into old conversations which are hard when they have been split up over multiple email addresses or phone numbers. Can't think of anything really that i dislike about E&C but if you're looking at using their product then definitely give them an opportunity. We were not able to find many other contact managers out there with such great features like calendars integration. So far we've found everything easy enough to figure our way around without any assistance provided by customer service team so no complaints here either!