This DVD of a live 2005 performance from the Zürich Opera under the musical direction of Franz Welser-Möst has many things to recommend it -- the young tenor Piotr Beczala as Alfredo, the marvelous Thomas Hampson as Giorgio Germont, the playing of the Zurich Opera orchestra, the simple but effective sets by by Erich Wonder, the uncluttered stage direction by Jürgen Flimm. It also has some flaws: strangely variable volume level of the recorded sound sometimes coming on so loud as to make one reac...