Should I move from version 12 to 13?

I have about 150 partners.  They are all and only windows 7 computers with unsophisticated users.  I have been using version 12 for almost a year now, and the results are just fine.

I have been holding off moving to 13, hoping to avoid any problems.

I am unable to find a summary of version 13 issues to help me make this decision.

Any advice would be very much appreciated.