What do you think of Anne Catherine Emmerich?

The visions of Anne Catherine Emmerich are not trustworthy.  Catholics should not read them.  The vision that you quoted is heretical because it says that there are pagans in Purgatory.  That is contrary to Catholic Faith. The fact is that there are no pagans in Purgatory.  All who die as pagans go to the fires of hell (de fide, Pope Eugene IV, Council of Florence).  To be saved it is necessary to have the Catholic faith.

Pope Eugene IV, Council of Florence, “Cantate Domino,” 1441, ex cathedra: “The Holy Roman Church firmly believes, professes and preaches that all those who are outside the Catholic Church, not only pagans but also Jews or heretics and schismatics, cannot share in eternal life and will go into the everlasting fire which was prepared for the devil and his angels, unless they are joined to the Church before the end of their lives; that the unity of this ecclesiastical body is of such importance that only those who abide in it do the Church’s sacraments contribute to salvation and do fasts, almsgiving and other works of piety and practices of the Christian militia productive of eternal rewards; and that nobody can be saved, no matter how much he has given away in alms and even if he has shed blood in the name of Christ, unless he has persevered in the bosom and unity of the Catholic Church.”

The vision you quote is not the only vision of Anne Emmerich that is heretical.  There are other visions of Anne Emmerich that are contrary to Catholic dogma, such as when she supposedly saw a Jew and Protestants in Purgatory.  All of those visions must be rejected.  They are contrary to dogma.  The “visions” of Anne Emmerich are a prime example why Catholics must be very careful when reading private revelation.  It can come from the devil.  A Catholic should not read Anne Catherine Emmerich, except perhaps to expose her false visions, for one's faith will be attacked and possibly corrupted.  It is true that Anne Emmerich did not write down her own visions, but had an editor doing it for her.  Thus, it's possible that the editor is responsible for some of the false statements they contain.  However, it is more likely that she simply received a number of false visions from the Devil.