Just finished it yesterday.
Imho, the theme of the game is really nice, the soundtrack and the writing and story.
But overall, the gameplay feels pretty weak, halfway through it felt very very repetitive and tedious. Shooting requires almost no tactic from beginning to the end, and the loot is well..... pretty shit. Loot is the weakest point in this game. Everything is just bits and ammos, after having 3000 ammos, I just stopped looking and taking anything.
The bantering was really nice, and there are plenty of banters. Most of the quest is just fetch quests, weapons are quite boring too, nothing much special with science weapons, end up just using plasma rifle all the way, with the occasional sniper for outdoors.
There isn't any big or game changing discoveries to be made outside getting your companions, overall, I think this game is a 6.5 to 7.
It has lots of potential, but none of them is achieved.