This talk will present an overview of gasphase experiments of molecular and atomic photoionization from the the standpoint of a user. The studies presented are specifically devoted to the study of single and double photoionization processes as well as photoelectron angular distributions. In addition to a brief overview of the physical processes studied, this presentation will have a stronger focus on the requierements and needs, both in terms of flux and resolution, that these studies pose to experimental beamline where they are carried out. A comparison of performance of experiments carried out at a second generation source and a third generation source will be presented, taking the autovibrational processes in H2 as a concrete example.