The Nikon F with an unmetered prism finder is neat. The Photomic finder made it a beast. However, the F did have its idiosyncracies, often due to providing for a very wide range of accessories. I still keep one around for times when only 35mm film will do.
My F with FtN prism and 20/3.5 Nikkor UD seems to weigh as much as my Linhof STIV.
I primarily use the plain prism and a LunaSix, reserving the FtN finder for close up work where TTL metering is handy.