one of the best stories ever told on film
I have seen MANY movies, including ones that are considered all-time classics. And I believe Bangkok Hilton is one of the best I've ever seen. Sure, visually or style-wise it's not particularly memorable, but the performances and story are so amazing that they completely make up for that. It doesn't hurt that it features some terrific actors, some of whom were already established names (Elliott) and others who would become stars later on (Kidman, Weaving).
The emotional power of certain scenes is something I've rarely seen equalled in theatrical releases. This is such a great story that if it had been shot with the same cast but with a more well-known director and trimmed down to around 3 hours (especially the first hour or so which is pretty uneventful and too drawn out), and released in theaters, it would be considered a classic and be high up in the imdb top 250.