ICE STATION ZEBRA occupied the last 2 hours of my afternoon. The movie could have lost 10 or 15 minutes of footage with no loss of continuity, but it's still an entertaining movie.
The DVD looks simply wonderful for a film this old, and the repurposed Dolby Digital 5.1 is excellent, especially in the "breaking through the ice" sequences and in the second half once they arrive at the station with the howling wind, etc.
Yes, it's obviously studio sets (no frosty breath when folks talk), but you expect that with most films of that era. Didn't bother me a bit.