What are the pros/cons of Hosted Exchange compared to hosted mail?

Hosted Exchange offers much more than simple hosted e-mail, our Enterprise Level Hosted Exchange infrastructure give you a higher level of reliability than other hosted e-mail services, add to this that your mailboxes are backed up every 15 minutes and the anti-spam/virus protection of Microsoft Forefront and you can have confidence that your e-mail is both safe from disaster and protected from spam and viruses.

Hosted Exchange is not just hosted e-mail though, it also allows you to share your Address book, calendar and task lists with all the users on your hosted Exchange account as well as being able to access this information from your laptop, Desktop or Smartphone, provided they have an internet connection of course.