I received mine today. Popped 'em into my Mac and, sure enough – discs 3, 4 and 5 have trouble playing (disc 3, in particular would barely mount).
I guess Image is determined to keep up Madacy's reputation for fine quality.
Anyway... surprisingly enough, the discs seem to play FINE on my stand-alone Sony blu-ray player - so maybe some of the reports of bad discs are because other people are trying to play them on their computers and having problems.
Anyway, great set. Amazing price. Maybe I should sell my copy of "Cinema Europe" before it pops up in the dollar bin somewhere...
Update: Uh, oh. Never mind. They ARE defective, after all. I got to the end of one of the discs, and my standalone absolutely refused to play the Larry Semon short. Maybe it was just trying to protect me... but, nah. Disc is bad.