I love the new Microsoft Excel. It has got new chart types and is smooth/fast to work with.
And there's nothing to not like about the new Microsoft Word. It's a lot like the Word 2013 but a lot has changed under the hood.
The new PowerPoint is also lovely. Again, it's a lot like the 2013 one but a lot has changed under the hood.
And if you use Access, you won't be disappointed either.
Finally, the Outlook is now a much better version of the Office 2013 one. Faster and lovelier.
The next question you might be asking is -- how do I get this new Office 2016?
You simply head here: https://products.office.com/en-us/office-2016-preview
The only requirement is that you need an active Office 365 license to enjoy it without any time restriction.