Using a Novoflex FUX-NIX adapter, I've been occasionally shooting with manual focus Nikon-mount lenses on my small Fujifilm XE- cameras since 2013. Some of the old Nikon lenses do better than others, eg: The Micro-Nikkor 55/3.5 is good in the close-up range, but shows it's weakness at infinity on the APS-C frame, presumably due to the greater degree of enlargement needed for APS-C. Some favorites from my small collection are the 180/2.8 ED AiS, AF-S 300/4D(used as manual focus), Zeiss ZF 100/2 and ZF 50/2.
The only downer with the setup is that accurate focusing at smaller stops, like f/5.6 and f/8 and beyond, is difficult, EVEN WITH the added luxury of EVF peaking and zoom-in.