The N75 is a neat little camera, it was an upper end amateur camera than lacked several features found on the N80: - Only had Automatic DX coding of film, no Manual overide - Used an IR remote release vs. a cable or plunger type release - Slightly smaller viewfinder - Lower flash sync 1/90 sec vs. 1/125 sec (N80) - Lower max shutter speed (1/2000s vs 1/4000s - one stop) - No on-demand grid lines
Neither will meter with AI or AI-S Manual Focus lenses.
As far as use, I have not used one, I had an N80 and purchased an F100 after that one died. Before the N80 I had the lack sheep of Nikon's lineup, the N70 - such a funky user interface. I have used my B-I-L N65, great basic fundamental camera capable of great shots.
If you are looking for an inexpensive film camera, I think that you will be well served with the N75 and a good AF lens. The 28-80 were pretty good, I liked the 28-105 for its reach and image quality. Pair it with a 35 f/2 or a 50mm f/1.8 and you'll have a great low light kit.