Haven't had problems with their new discs (there is still a couple I need to see, but Johnny Hamlet and Alamo worked just fine) but I did have problems with the Big Gundown disc of the Sergio Sollima box. If I remember correctly it skips an entire chapter probably at the disc layer change. Not on all players though. I suspect the disc (and all the Big Gundown discs on all the boxsets) is still faulty though and some (most) players just are able to handle it better. Or maybe it is just mine.
I think I had problems with Death Sentence as well, but can't remember what kind of.
As for the NEW release of Bandidos, I returned my first disc because of some problems with playback at the early scene of the bandits chasing the train. Didn't actually check if my replacement disc works or not (I prefer the SPO disc so its not a big loss if the replacement is bad as well).