The user interface is very easy to use, I like that it has all my contacts in one place so there's no need go digging through multiple applications/sites or emails looking at different lists of people! Sometimes if you try something new (like adding an event) then when updating other info related fields may not automatically update as well which can be confusing sometimes but overall this product works great!! It saves me time by having everything together instead going from application A -> B-> C; etc.,.