Great for time tracking, works the best with Chrome extension plus Android app.
I didn't use all the features available but for my needs it worked out perfectly. Their customer service is very responsive and polite when it comes to inquiries made.
Track all the time you spend on meetings or events by syncing our time tracker with Microsoft Outlook Calendar. Plan ahead your time tracking with our Microsoft Outlook Calendar integration.
Microsoft Outlook Calendar, a component of Outlook.com within Small Office Online (distinct from Microsoft Office Outlook), is a web-based calendar service developed by Microsoft, succeeding Hotmail. In addition to providing IMAP and POP3 email access, Microsoft Outlook Calendar seamlessly integrates with various social networks, such as Facebook chat, enhancing its functionality beyond traditional calendar services.
http://www.outlook.com