I saw this film last week. My expectations were quite high considering it is one of my favourite film franchises and it was directed by the original director of Alien, Ridley Scott. It is set after the events of Prometheus and before Alien.
There are plenty of scenes similar to the other Alien movies and if this is what you like then you will not be disappointed. However, if you want something a bit deeper, like a coherent story with threat and menace involving mankind, corporate corruption, cryogenics and genetic engineering then you can pretty much forget it other than at anything but a superficial level.
My experience of the film was very mixed, I enjoyed the thrill ride while I was watching it. Some of the photography was amazing. But afterwards I just felt that it didn't make any sense at all. I liked Katherine Waterston's character Daniels. She made a good replacement for Sigourney Weaver's Ripley.