Yeah... I too don't really recommend using it. like what I've said. And I think product dev in N also realized that. That's why they instead focused on developing the core in 2016.2 - Im not sure though if the promised enhancements have already been deployed. For the past years, we always tend to convince clients not to rely on the matrix function most specially if the core products they sell will evolve overtime. It's hard to transition historical data without creating new records 🙂