I have been using Microsoft Outlook as my email application for about 5 years and it has worked great. Here are some new features in Microsoft Outlook 2013:
Look and feel
In its current incarnation, Outlook still looks like, well, Outlook, but you’ll notice that many of the options aren’t immediately visible. Much like there’s no fixed Start button in Windows 8, the flags in Outlook only appear if you hover next to a message with your mouse. Also new with this version: a weather bar stretching across the top of your calendar. You can manually change the location, but by default, Office shows only one set of weather forecasts at a time. Another, more miscellaneous change: if you’ve begun to respond to an email, but saved it as a draft, the word “Draft” will appear in red in your inbox, next to the message (yes, just like Gmail).
Peeks
With this version, the company is also introducing fly-over menus called Peeks, which show things like calendar appointments, to-do items and information about your contacts. To find these, look for the icons stacked on top of each other in the lower left corner of the screen. Mouse over the calendar icon, for instance, and you’ll see a live, pop-up window that allows you to glance at your agenda without having to toggle between tabs to check your schedule. If you’re wide open, you’ll see a message saying you have no appointments; if you are booked, it’ll tell you when.
source: http://www.engadget.com/2012/07/16/microsoft-office-15-preview/
-Yuriy Senyut