Orlando furioso is probably the best opera composed by Vivaldi, and its musical quality is only comparable to the best Handel operas. There is no a boring aria in all the opera, and some of them are really wonderful, from the intensely lyric "Sol da te mio dolce amore" to the more rythmic "Ascondero il mio sdegno" or "Nell profondo cieco mondo". The sound of the orchestra is incredible, full of dynamics and effective changes of volume, very typical of Spinosi. The singing is wonderful, Hallenberg is one of my favourite singers, and this is one of her best recordings. Lemieux is a wonderful Orlando, specially in the recitatives where she displays a very dramatic singing. Countertenor Jaroussky singing is very tender (e.g. his first aria "Sol da te mio dolce amore"), and this is one of his best roles. The rest of the cast is equally wonderful. I think this is the best Vivaldi opera recording , although La Fida ninfa and Griselda, also conducted by Spinosi are very close. In fact, I think this is one of the best baroque opera recordings of all time. 10/10.