I bought my EM5 to lighten up the load when I hike in the Apennine mountains, but it is another aspect of the EM cameras which continues to amaze me. I like to do Architectural photography and the only way to see certain places is to partake (unwillingly) in a guided tour with all the limits of time and crowding. So with no tripod, IBIS gets the pictures done often at 1/15 in the interiors of dark ancient monuments that I visit. FF would give me better technical quality in theory (but I would need a tripod as IS gives about 2 stops I believe), but in practice the superior Olympus stabilizer wins out for me. So for now the siren call of FF can be postponed for now as far as I am concerned. Here is a recent set at the San Benedetto Monastery near Mantua, Italy where for the iteriors IBIS helped a lot.