I've shot with my F4s for years, and it is the favorite of any camera I have ever used. It rarely sees any AF lenses (occasionally the 80-200ED 2.8), 90% of the time it's ai or ais. The viewfinder is 100%, big and bright. I have a half dozen or so different screens, and this past summer treated myself to a DA-20 prism ( LN w/original box, packaging and papers- $250).
F4s w/DA-20 and Nikkor 180 2.8ED ais