Saw it yesterday. I was pretty thoroughly entertained but left feeling a little unsatisfied. There were a couple of significant loose ends, I felt, and, IMHO, it was made a little too complicated at times. Alien and Aliens worked so well because they were pretty simple, plot-wise. Overall, though, I found it to be incredibly suspenseful and visually stunning to behold.
SPOILER ALERT:
My wife, who was 28 and pretty fit at the time, had an emergency C-section with our first child and there's no way someone who's just undergone that procedure is going to be running and jumping around just minutes afterwards. Even if she was all drugged up and pumped full of synthetic adrenaline or whatever, your abdominal muscles are shot for a few weeks, at least. Not happening.
