The proposed Experience Centre is devoted to the metrological assessment of quantitative phase imaging (QPI) systems using bio-inspired phantoms manufactured via two-photon polymerization. The QPI is a rapidly growing 2D/3D microscopy market segment. An increasing number of companies deliver phase measurement systems worldwide. QPI systems are applied as efficient noninvasive (marker-free) measurement and monitoring tools in biomedical applications at the cellular level (e.g. in drug administration and interaction studies). However, there is no unified approach to metrology of QPI systems, making measurement validation and standardization challenging but also demanded by the market. For this reason, in True_QPI Experience Centre, participants will learn about the core advantages of QPI in biomedical imaging, how to setup metrological validation of their QPI instruments, how to use existing calibration objects to maximise their potential and how to design and use new, complex, bio-mimicking phantoms. Through these activities, the participants will gain insight into the limitations and uncertainty of phase measurements, which is vital for the QPI community and a unique opportunity for this industry to grow.