I have three of these. I prefer it to the FM because it has interchangeable focusing screens. The FE had an undeserved reputation of being a battery eater. If you leave the advance lever pushed in when you are not using it, the battery can have a normal lifespan. The FE replaced the Nikon EL-2 in 1978. The may have overlapped for a short time. The electronic components of the FE have aged well. Most of the ones I see are still working. The FE was an early AI [Automatic Indexing] Nikon. The AI tab can be flipped back so that pre-AI lenses will fit.