STEPHI is a photometry network that aims to obtain data to reach a better understanding of the physics of stellar interiors by seismology of δ Scuti stars. For ten years now STEPHI has been harvesting multisite rapid photometry data of δ Scuti stars on the main sequence. With 12 δ Scuti stars observed during three-week, three-site campaigns, STEPHI has produced a significant amount of the data available on δ Scuti stars for seismological study of this stage of evolution. The STEPHI data have already been basis of several theoretical interpretations (see http://dasgal.obspm.fr/ stephi). Here we focus on some aspects of our observational strategy and results.