This product is a digitized version of an outdated text, which includes most notably Irenaeus' Against Heresies. The user should be aware that the text given here is that of Migne in the series Patrologia Graeca, itself a reprint of Massuet's 1710 edition, which has since been surpassed by the Sources Chretiennes edition by Rousseau et al. that among other things benefits from the discovery of the Armenian text for Books 4-5. Before Rousseau Harvey's edition was standard. So, in using this text, one is using it for convenience and to an extent because it represents, with its commentary, an important point in the history of scholarship on Irenaeus. As with other Logos editions of bi-lingual texts, Logos has separated the parallel Greek and Latin columns as distinct resources, and furthermore has sold the Latin commentary separately as well. This is a shame, for it greatly reduces the convenience of the text(s). Theoretically, one could link the English Irenaeus to the Latin and Greek texts and read them side-by-side, but since the Greek is fragmentary, whenever one reaches a gap in the Greek text (which one does often) the software automatically switches the Greek resource to the corresponding Latin Logos volume. The result is that one will quickly end up with two Latin PG volumes open and will have to constantly re-open the Greek volume to see if there is a corresponding fragment. Or else, one can decline to link the Greek text and look up the passages as needed. The inconvenience of having the footnotes in a separate text is obvious. Since the main appeal to having the text of Migne on Logos is its convenience, the failure to present the three elements in a cohesive whole and difficulty with making them operate as such on Logos' system is noteworthy. The searchability of the Latin text and the possibility of linking it to a translation makes it worth $10. The other elements will be consulted on an as-needed basis, and for that, one might as well have the PDF of Migne, available free of copyright online, open in a separate application rather than paying $20 for them.