Update 11/19/2011: I originally posted the review below in which I complained about the DTS surround track. Since then, I've bought a newer AVR which supports high-resolution audio such as the DTS-HD MA on this disc. My previous AVR didn't have an HDMI input, so I connected the video using HDMI directly to my HDTV, and used a digital optical cable for the audio from my Blu-Ray player to the AVR. This worked well for my other Blu-Ray discs, because the high-resolution audio was down-mixed to a a five-channel surround mix that sounded fine. For some reason, this Blu-Ray did not sound fine using that system, but it sounds great with my new AVR. The vocals are clear and no longer sound overwhelmed by the orchestra, and the orchestra sounds clear and well balanced.
So I am revising my rating from 3 to 5 stars, with the caveat that you *may* experience the audio issues I described below if you do not have an AVR that has an HDMI input for your audio signal. I believe that some Blu-Ray players also output high-res audio over multi-channel analog cables as well, so that should work too If your AVR does support high resolution audio, you'll hear an outstanding performance in excellent surround sound. I'm pleased to recommend this disc, which continues to be a real bargain.
Original review: I agree with the positive reviews about the performance, and the image quality of the Blu-Ray is excellent. Unfortunately, I found the DTS surround track to be very poorly mixed, with the orchestra sounding sloppy and often overwhelming the singers. The 2-channel stereo mix is better, which would indicate that the problem with the DTS was in the processing and not inherent in the recording itself. I at first suspected the problem I was having with the DTS might have been a result of my equipment, though I haven't had any similar problems with other opera Blu-Ray discs, but after reading a review on a Blu-Ray review website complaining about the same issue, it's clear that others have experienced it, too. Still, for $9.99, you get a great performance, outstanding picture quality, and if you're willing to settle for stereo instead of surround, an acceptable sound mix.
The bonus materials consist of trailers for other productions, and the menu to access these is sluggish and clunky, hardly the best way to convince buyers to shell out for more from this company. All in all, the whole disc strikes me as a missed opportunity.