Anyone just using Microsoft Office (not Exchange etc) through 0365?

Hi,

I'd like to know if anyone has purchased their Microsoft Office licensing through O365 as opposed to the traditional OVS / OVL etc agreements. We have the option to purchase Office through O365 on our OVS agreement but this will require re-install of Office with the O365 version. 

Are you also using Federation to facilitate the single sign-on to license the install of Office?

Does the shared computer activation work?

Any gotcha's you have come across?

Any feedback welcome but please note this isn't a general question about Exchange / Sharepoint etc, this is solely for the Microsoft Office suite.

Thanks in advance.