You can usually rely on the Met to produce solid operas with a few forays into the spectacular.
Manon Lescaut, however, is a disappointment - its flaws are too obvious. The casting of the two leads do not work. Manon Lescaut, herself, has a look and voice too mature for the role, and this impacts Des Grieux who seems disinterested. People fall in love quickly in operas, but from the moment Karita Mattila disembarks from the carriage, you know this is going to be a struggle to make this believable; and hence Act 1 is strangely disengaging, which in turn has an ill effect on the whole opera.
As neither Mattila nor Giordani are the top singers in their field and, this, combined with the ropey casting, means this version of Manon Lescaut is flat. This is a shame as, musically, this is one of Puccini's better scores and the Pit in this production perform a fabulous job.
Unfortunately this all adds up to a recommendation to seek Manon Lescaut out, but not this version. If you would like an introduction to the Met Operas on DVD, I would recommend their version of La Boheme (available on this site)