Continuing from previous seasons, Season 11 of mayday continues of the tradition of presenting a story that can be easy enough for a layman to follow, but also allow for critical thinking by professionals in the field. It's crazy because I'm watching a DVD in the US, that was purchased from New Zealand, manufactured in Mexico, produced in Canada, about air crashes around the world. This DVD set is truly global. I recommend purchasing this, especially considering how hard it is to get your hands on the entire series (unless you live in NZ or Australia), only because you can watch season 3 & 4 so many times before you get bored (and not everyone can drop $200 on the Black Box collection).
This collection is Region 0 PAL, and It plays on my simple Phillips Blu-Ray/DVD player just fine. But always check your DVD/Blu-Ray player manual to ensure that it does in-fact support PAL. Video playback is fantastic, no quality issues.