I love the ingredients on the back
As far as sales go, I predict moderate/little success initially then it will drop off. Apart from the hardcore stans, I don't think it has the appeal for longevity.
1) The bottle isn't really eye catching. The bottle will play a big part in roping in the sales but this bottle just looks... plain and weird. Coming from Gaga I expected something more extravagant, even Rih's fragrance has a more creative bottle. Katy's one is quite cute (my sister and her friend both fell in love with it and bought it immediately when they saw the bottle and smelt it)
2) Though Gaga has female stans (indicated by the diversity of the fans at the tours), the majority of women from 14+ are either impartial to Gaga or hate her. They won't give her the long lasting sales that Bieber pulls in. Bey and Rih has more appeal to women so would pull in more sales.
Though we can't be completely sure as of yet. She might do a really good gift set bundle to go with it. When I worked at The Perfume Shop the Purr fragrance gift set by Katy (which had a necklace and shower gel I think) was quite popular with women at Christmas. And the advertising has yet to kick in which could slay and get people interested.