I have to agree with those on American amazon.com who have issues with the sound engineering choices. On my decent Bose headphones, the singer and orchestra are both very present but rather obviously in different aural space. Garanca suffers -- she sounds as if she's in a slightly "boomy" acoustic, and one result is that the voice seems a bit spread and the diction doesn't come through clearly in the higher reaches especially, even though she obviously has no trouble with the notes. The orchestra, on the other hand, sounds fine, and the wind instruments come through beautifully in the very-well wrought accompaniments to the arias here.
And it's a shame. This is a very fine voice, I think, and the program is excellent. Most of the material here, like the arias from "The Maid of Orleans," "Sapho" and "Le Roi d'Ys," is not all that familiar and usually can be found only on recital discs. The arias from "Samson et Dalila," "La Damnation de Faust," and "La Favorite" are more familiar, but it's great to hear them sung as well as they are here. My favorite, and it's just maybe that it took me by surprise, was the aria from Vaccai's "Giulietta e Romeo." (Vaccai had been hitherto unknown to me.) It's part of the tomb scene, obviously, and according to the program booklet, was sometimes substituted into the last scene of Bellini's "I Capuletti ed i Montecchi" -- it's absolutely beautiful, and beautifully sung here. Garanca's singing throughout is marvelous. She has a warm, rounded voice that retains its quality all the way down and up, and at this stage of her career, at least, she isn't at all stressed by the demands of this music. With better engineering, this would be a no-brainer 5-star recommendation. The sound deserves a good bit less, but I have to go with four, for the sake of the musicians.