The user interface is easy to use, very helpful when you need help figuring out how it works or what features are best suited for your needs! My only complaint would be that there could have been more choices in terms of customizations (i like having so many different fields) but I guess they did this because we needed them all at once? There's nothing bad about any of these things; just choose something which fits into their system well if possible :) Our organization uses physical addresses as part of its overall corporate identity/branding strategy & helps us maintain consistency between emails from internal employees who receive email messages via gmail vs an employee using outlook client software etc.