Just a word of warning that this full score is in all the original clefs, including all the vocal parts. So unless you are an expert at reading obscure clefs, you will find it very hard to read from. Instrumentalists might be good at this but, as a mere singer, I have given up and am now looking for an ordinary vocal score. This edition, being "authentic", is lacking in later additions which you would expect to find in an appendix e.g. the usual ending to "Che faro", or "Addio, miei sospiri", which you might not want to do in performance but makes a useful concert aria. So while it might be fine as a study score, it is not very practical as a performing edition.