This film was magical for me, and I've always enjoyed the topic of forbidden love. For those who haven't seen this movie, other reviewers have spelled out the plot very nicely.
The heart of the story is the juxtaposition of the hardened, big city detective in the midst of Amish country, and it centers on his relationship with a young, beautiful Amish woman and her son. Exteme opposites that do, indeed, attract. The sparks fly between them and keeps the viewer captivated (at least it did for me). Kelly McGillis played an exceptional role in this film (her first film, I believe). I'd rate it as her best performance by a long shot. It was also one of Harrison Ford's better roles. And Lukas Haas was very convincing in all but one scene.
The cinematography and Jarre's music was lovingly layered, and displayed throughout the Pennsylvania local. The barn raising scene was especially wonderful, and gives the viewer a true yearning for a simpler, more family-oriented life.
Not everything worked in this picture, however. In a couple of places the editing seemed haphazardly done. The scene where the cops are on the front porch of Ford's sister and questioning her is an example (the voice-over didn't work at all). Also, the scene at the end when Sommer is leading Ford and McGillis out from the barn, you could almost sense the director calling "action" and the scene beginning. Pretty disturbing for this caliber of film. Another minor annoyance was when Danny Glover, after being shot, raises the shotgun toward the ceiling with one hand and pulls the trigger. There was absolutely no recoil. I don't have a clue why this scene wasn't redone. Anyone who knows anything about firearms will shake their heads. Finally, and more importantly, the `bad' cops just weren't convincing as real people...ala...human flesh and blood. They seemed to be punched out from the standard Hollywood cookie-cutter.
That's a lot of stuff not to like in one of my favorite films (I also have several more minor items that I didn't mention). But I forgave these transgressions to my suspension of disbelief, and ended up really enjoying this film. I haul it out every so often just to be transported to another world and watch a great love story done to perfection (no melodramatic "smaltz" here). Between 1 and 10, I give "Witness" a marginal 8. A little more care in those areas I mentioned and this could have been a 10.