I have them all on BR. Other than just thinking part III sucked, I didn't notice any difference in video or sound quality between the three (but wasn't trying too hard to evaluate them either). None were earth shattering, but on par with the rest of the NON-reference level disks I have. I also have a couple BR disks that don't look any better than the SD version, but they do sound better so they weren't a total waste of money.