Compilations - particularly those which include only sub-selections from individual works - are often frowned upon by classical purists. However with opera in particular it is entirely possible that you might not want to listen to the whole work, but only to individual musical elements within it. For what it is (note that my opinion here is likely coloured by the fact that - with respect to opera - I am very much NOT in the 'whole work or nothing' crowd) this compilation is the best available. No obscure, technically iffy and musically mediocre renditions here: this compilation centers around orchestras and conductors which need no introduction. In particular the Karl Bohm version of the Prelude to Act III from Lohengrin is among the best recordings of _any_ classical music I have ever heard. It really is no exaggeration to say that it is worth buying this CD for that track alone - but you also get very good recordings of other Wagner music too. Put this in your 'definite buy' column!