I'm watching this:
My advice:
If you like your Tannhäuser with a complete overture instead of having it cut in half so that you're suddenly thrown right into the Bacchanal, don't buy this.
If you like naked boobs, buy this (they're beautiful).
If you hate Eurotrash, don't buy this.
If you like your Venusberg to be a surrealistic Bosch-like nightmare with lots of naked boobs and a woman-eating crocodile (the woman in question also with rather beautiful naked boobs that wiggle while she's being eaten), buy this.
If you like your Hall of Music to actually look beautiful as intended, don't buy this.
If you like your Heinrich Tannhäuser to be interpreted by a singer who is not 30 years past his prime and doesn't have an awful, embarrasing wobble like René Kollo in this production, don't buy this.
If you like your Venus to be absolutely gorgeous looking, very sexy, the ultimate incarnation of seduction, the ultimate Goddess of Love with a beautiful voice to boot like
Waltraud Meier in a breathtaking performance, buy this. (Sorry, *her* boobs are not part of the show, but at least she's got nice cleavage).
If you don't like silly political symbolism like a big Berlin wall with the words Germania Nostra, don't buy this.
If you like your opera videos to have a few more colors than black, white, and gray, don't buy this.
If you love ugly depressing settings, buy this.
If you want your Wolfram, your Landgrave, and your Elisabeth with good acting and singing skills (Bernd Weikl just a little passed his prime but still pretty good, and excellent Jan-Hendrik Rootering and Nadine Secunde, almost a show stopper), buy this.
If you want a good conductor, don't buy this (it's Maazel).
If you like your choruses to be superb like the Chorus of the Bayerische Staatsoper, buy this.
So, obviously a mixed bag.
It's almost worth buying for Waltraud Meier, but Venus doesn't stick around as you know. René Kollo pretty much ruins it, in spite of the notable effort by Weikl, Rootering, and Secunde to save it. If the Eurotrash aspects has been kept in the first act only, it would have been a valid contrast between Venusberg and Thuringia, but the way it was done it pretty much ruined the whole thing as well.
I think in summary the negatives outweigh the positives, so if you're not a passionate fan of Waltraud Meier, stay away.