Ever since I first heard the Requiem, I have always felt that the ending movements lacked the power of the opening movements. This is for obvious reasons, most notably that Sussmayr completed much of the final movements, and supposedly composed "from scratch" the Sanctus and the Benedictus. For this reason, I always found the last few movements aggravating to listen to; I would find myself wondering "what if Mozart had lived to finish this movement? What would the Hosanna fugue have sounded like? What would he have done with the Sanctus (and the most obviously non-Mozartean techniques in the work were discarded?")
Well, if you have found yourself wondering "what if", it is definitely worth hearing this recording. Professor Robert Levin re-interprets much of Sussmayr's completion, often times making outright changes to the scoring and music to give it a more Mozartean feel. Levin apparently modeled many of these changes after the Great Mass in C Minor in terms of construction; and being a huge fan of that great torsoed work as well, the effect is not at all unpleasant. As a lover of all fugues big and small, I highly recommend listening to the 'Amen' fugue at the end of the Lacrymosa (a piece based on a fragment recovered in the 1960's), as well as the fully developed alteration to the 'Hosanna' fugue which aggravated me for all those years prior to this disc. The recording is excellent, with great spatial definition and a perfect recording of the chorus. In particular, the SACD multichannel layer really shines. My only quibble is that the soloists are not the strongest I've heard - it's not that they are bad, they just are a little light. Regardless, this disc is a must-own for die-hard Mozart fans as in my opinion it represents a more honest look at Mozart's greatest work.