I like that it is very easy to use (it's intuitive) - you don't need training! It has made my life so much easier by allowing me access from anywhere at anytime via email/mobile device even when i'm not in front of our office computer system which makes sending out information an absolute breeze as well as receiving them too!! There are some things we have been able to do better than before but nothing major just little niggles here & there.
We've saved time having less phone calls back home during working hours especially over long weekends etc because people know they will receive their emails no matter where they happen be without needing us calling everytime someone needs something sent off again.