This is the back of the package:
Region code 0 will not cause any problems on any players.
You are absolutely correct about the dynamic range. It is colossal. My wife was leaving the house just as I was putting it into the player and did not return until the last 7 minutes of play. I set the volume at -22db, which is loud on my system, and let it play through. I was very impressed with the product. The recorded sound is great. I know the box says its DD 5.1, but I could swear my Anthem said it was playing DTS HD Master Audio (that rig is powered down now, I'll confirm/deny this the next time I power it up). [I just confirmed at
arthaus-musik.com that it is DTS HD Master Audio] Anyway, I was also extremely impressed with the camera work. The director knew every nuance of the piece and had his camera men exactly where they should be throughout the work. Editing was first rate. Overall, a really good product. My first concert on blu-ray, but if other ArtHaus products are like this, and the trailers on the disc for other releases indicate they are, it will not be my last.