I saw this one when I was in high school. I had been warned ahead of time, but I liked classical music, including Grieg, and ignored the warnings. I remember several things about it that really sum the film up, in my opinion.
1. The photography was stunning. Snow, fjords, and Norwegian towns and scenery were really pretty, as were the folk costumes.
2. Grieg's music was nice to listen to, though as in all films about composers, they only give samplings.
Those are the good parts. The bad parts were what sank the boat. There wasn't much of a story. Greig's life wasn't as exciting as many other composers lives, and a lot was padded to keep the story going for 2 or 3 hours. I remember a lot of overacting as well. But the worst part of all was the directing. Forever emblazoned upon my memory is the hideously clichéd scene where Grieg, his wife, and someone else spread their arms and run across a green field, stop on a hillock, and spin around to face the audience. Then they do the same thing again - and again! If that's not enough to make you give up, then nothing is.