I have used the zoom along with a OMD EM-5 II in travel, the image quality is good but not great. Little difference to its predecessor, which is the visible seal against dust and splash water. Unfortunately I have not found any IP number to weatherability. The images of the Sony RX100 III and the Sony RX 10 were more detailed and sharper.
I have now instead of this objective, the RX10 Sony bought 24-200 mm 2.8 and 1 'sensor reaches the MFT water
I use a 4k color calibrated monitor is to ensure that the limits of the estimated of me 16MP sensor come unfortunately more to the fore .. The Olympus I use only with fixed focal length and a zoom 9-18mm