I've used the software, it was OpenERP in its previous incarnation. I've ploughed my way through the developer and user documentation.
The documentation is abysmal, much of it is not updated between versions and can refer to settings, functions, etc that no longer exist. In some cases I've seen it refer to whole sections that no longer even exist like report design and outlook integration. There are numerous places where it refers to things that do not exist unless a specific module is installed but at not point does the documentation ever mention that the module should be installed.
On the developer side, there appears to be much that is broken by design rather than by error. For what is supposed to be a piece of critical business software, the inability to do something as basic as a bank reconciliation and print off an aged debt report out of the box is unbelievable.
Perhaps working on the core competencies of the software instead of diverging into including web site builder and CMS systems ? Your product can't do something as useful as calculating the cost price of a Bill of Materials assembly, so get the basics working and documented clearly before you do anything else.