One is the surprising fact that the 3 hours go by relatively quickly. Another is the wonderful scenery and the stirring music in the background. Yet another is the solid acting. A generally ho-hum plot. But the plot has no surprises in it.
Nothing is very original about it.
But the stuff that is there is watchable at least. The plot basically begins when William Wallace is a kid and his father is killed in an attack on the English. William Wallace lives in Scotland and the evil King of England is ruling over Scotland. The Scotland peasants want their freedom. William Wallace then gets a visit from his uncle who tells Wallace to come with him.