Godfather 2 is is 3.5 hours and I don't think many people would say it's a poorly told story (there's even a ~7 hour version of 1&2 made into one film)
As long as it doesn't feel padded out for no reason and just long for long lengths sake then it should be ok. A good story will keep you drawn in for that length of time
As long as it doesn't feel padded out for no reason and just long for long lengths sake then it should be ok. A good story will keep you drawn in for that length of time