Very interesting. Are they all good performances? I actually only have Orfeo (Gardiner, very happy with it), but have been looking to add Poppea and the others would just be a bonus. And do you know if there is a full libretto for all of them?
These are among the most highly regarded performances of these works.

I have not heard every one of these recordings, but I hold this version of
L'Orfeo to be among the three finest on record (the other two being Parrott/Taverner and Alessandrini/Concerto Italiano).
One of the most striking things about Garrido's Monteverdi recordings, is the very vibrant continuo. Singers and instrumentalists read like a who's-who of today's period specialists.
I have the box added to the wishlist and plan to purchase it soon. Hat tip to
north star, who first posted about this set on GMG.
