content: I bought three of this company's Blu-rays ... save your money and get the CD. Better yet, get an SACD version for real high-quality sound. I have "Tchaikovsky Piano Concertos Nos. 1 & 3," "Bach Orchestral Suites No. 1, 2 & 3," and "Vivaldi Four Seasons" in these discs. None will play in my Samsung Blu-ray player with the latest firmware. All play in my Panasonic. The sound quality is no better than standard quality 5.1 surround; in fact, I suspect they just copied the material from a standard 5.1 version. There's very little sound in the rear channels and virtually no separation. Sounds like stereo. Save your money, these are a rip-off.