I like that it's very simple yet powerful webmail platform which can be used by anyone without any technical knowledge of computer or server administration as well! It also has great customer service - they are extremely helpful when you need assistance setting up something new (like forwarding mail from one address/MX record) or if there was some sorta problem along the way.
The only thing i dislike about this product so far would probably just come down to personal preference but since we've been using them now over 2 years ago our experience hasn't changed much other than their continued improvement upon themselves every year. Their staff members were always willing to help us out whenever needed even though sometimes things had gotten quite busy during peak hours due to how many people use these services daily!