So I'm not familiar with the source material this is based on. Never read any of that and I'm making this known from the get go. So I can't really give you an insight about any differences about any comparisons there. Having said that, the general theme and the idea behind the show is quite nice.
Human survival and struggle is something we can identify with. Aliens on the other hand may be a stretch for some - though let's keep it real, with such a big universe out there ... who is to say if there isn't any other lifeform out there. But if there is, would that be how things played out? Probably not. From a very engaging and quite draining (in a good sense) beginning ... well this takes some directions that I would not always agree with.
Too many coincindences, too convenient at times and quite a lot of cliches storylines combined. But it is still possible to get you, to make you care to quite an interesting degree. You get accustomed to the characters after a while and even the wildest ups and downs - you just get with them. Having a very bad apple becoming a part of the group, as backup to stir things up every now and again ... it's either clever or cheap writing.
Science Fiction - you may like the soap opera elements or not. But you can have fun (to a degree) with this
