I've played the first chunk of the game.
Is it as bad as some people are saying? Well... Sorta.
Lots a glitches abound. AI freezing up. AI scoring cheap one shot kills out of nowhere(The Mercs. The aliens are completely weak sauce.). Allied AI that consistently seems to shoot at walls, missing the targets entirely. I fell through a floor and died out of nowhere. Several spots where you would think you could jump down, or explore, you can't. Very linear experience over all. I was witness to a warrior getting stuck in the ceiling, and a face hugger getting stuck in the base of an egg.
The eggs near Keyes are props, they don't open. I had a feeling every time people wouldn't bother going near them. Facehuggers seem to pause dramatically before leaping at you, making them easy pickings, and not scary in the slightest.
I'm having some fun, but there are a lot of things that are just broken. It's put me on the fence and has me really questioning the DLC pack. I do want to play Bug Hunt, but i'm not sure if I want to give Gearbox that kind of money.
I'm pausing for now until I can find a PC player to co-Op with.
I'm working my way through the campaign on Ultimate Badass mode, by the way.
I recommend to anyone still on the fence, get it when it goes on sale, or in the bargain bin.