I think your first stop should be here:
Discontinued features and modified functionality in Access 2013
It also appears that they have messed with the interface again... maybe not to the extreme as with ACC2003 > ACC2007; none-the-less, some changes.
The only real positive I see here is the move away from the JET/ACE to SQL/AzureSQL.
I would set up a proving PC, download the trial version first and play with the trial before purchasing.