I went and saw it opening night at midnight in IMAX 3D, and it was an amazing movie. In some ways, it is a prequel to ALIEN, while in others, it stands on its own as a completely separate scenario. I still take it as a prequel to ALIEN, and it was interesting to see what questions were answered.  All I can say is: “bring on the sequel!” 🙂
I saw it on it's first day and sadly it left me cold. I've seen it twice more since and like all Scott's films it's got better with repeat viewing. It is a beautiful looking film although I find the music is a bit too grandiose and intrusive.
I don't have any problems with the so called plot holes that many are complaining about, however I just can't get over how poorly written the characters and their motivations are. It remains a huge stumbling block for me.
 Yeah, this film probably divivded the ALIEN fanbase somewhat.
The music…I rather liked it at the beginning, because the movie was supposed to be suggestive of “exploration”…and it even made me think of StarGate.  I also liked how they employed a passage from Jerry Goldsmith's original ALIEN score during one particular scene…that jumped out at me. 🙂