Integration with google apps and gmail is awesome!

The system is easy to use. The introductory email sent to you when you sign up has all the right information to get you started, and a link to get you in touch with their customer care team just incase you ever need help!

Many intyeresting feaytures that make it easy and intuitive. HOwever, many large scale features especially for large enterprise are not yet available. Hopefully they come out soon...