Been using the extension to migrate the data to our Magento store. Probably the only extension out there handling b2b entities, especially companies and requisition lists, which we are heavily dependent on. The support was responsive, however it took them about the week to keep up with our file formats and data struture. Nevertheless, they did a great job, especially considering the costs of the migration we would have paid to the development agencies to migrate the data for us. The in-house developer handled the case just fine, with some minor consulting.