These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Holy Shit Quotient: Despite the film being over 40 years old, enough stuff was exploded and riddled with bulletholes that most of the effects are still pretty cool. Throw in Clint Eastwood and Richard Burton trying their hardest to level the Alps without so much as breaking a sweat, and it's difficult not to be impressed.
Special Effects Failure: While most of the effects, namely explosions, are well done and are, for the most part, realistic enough for most viewers, one instance has not aged well: when Christiansen falls off the tram car, it's quite obviously fake.