We discuss results from a joint XMM-Newton and NuSTAR campaign on the Seyfert 1 NGC 4593, consisting of 5x20 ks observations, spaced by two days, performed in January 2015. The source shows a remarkable variability, both in flux and spectral shape, on time scales as short as a few ks. The spectrum clearly softens when the source brightens. The spectral analysis reveals (i) a warm absorber consisting of two components with distinct ionization state and velocity; (ii) two distinct reflection components: one consistent with being neutral and constant, one ionized and located within a few tens of gravitational radii from the primary source; (iii) a soft excess consistent with being due to warm Comptonization. We will also discuss the energetical and geometrical constraints obtained from physically motivated Comptonization models used to describe the broad-band (UV/hard X-ray) spectrum. a