What makes this production very watchable (and of course, buy-able) is the sheer quality of the video and audio. Had this not come out as a BD but as a DVD without the HD quality, I dont think it would have stood a chance next to the Met Opera production with Levine and Paul Plishka, von Karajan's production with Giuseppe Taddei or the one with Bryn Terfel ROH production. My favourite is still the Levine with the Met.
Having said that, I could not find fault with the singing - each and every character in this production has done a remarkably good job of belting out (sic!) their parts very competently. Especially Eva Liebau, who to me, is a find with a beautiful light voice for her role as Nanetta. The other ladies are just too famous and well known and do their job as they are expected to.
The reason why I prefer those I have noted above has more to do with the staging and the costumes of the characters. Ambrogio Maestri, who sings wonderfully and actually looks the part of Falstaff unfortunately also looks too squeaky clean for a Falstaff - not the character either Shakespeare or Verdi had in mind. The sets do not in the least even try to emulate an English look. It looks as though the whole takes place around a Mediterranean or a Spanish setting. To me, these things play spoil-sport and takes away the ambiance on stage in which to me, is almost as important as the rest of the production. If it is only singing that one is interested in, I think a CD will do.
This is however, the best Falstaff available as yet on BD. I would not even care to watch for free the Glyndebourne production of the same in BD for the above reasons magnified X times, however good the singers are.
My summation? If you know the work well, it is worth buying this one for the sheer tech brilliance with which it has been produced. If this is your first Falstaff, avoid.