Pros:

1. It helps to schedule your daily task without obscurity
2. It links with your LinkedIn profile to keep you updated with company headlines and new acquaintances
3. It synchronizes your email and reminds you of important ones you should respond to
4. It also integrates your CRM keeping notes of your previous interactions
5. It needs no extra app for it to work
6. It synchronizes your calendar and gives prompt reminders so that you wouldn't miss on any schedule

Cons:
I can't find any yet