[spoiler] Fun for a while but then Disappointing
It ends with a boss battle that doesn't seem winnable at all. Maybe I used the wrong weapon or didn't aim properly but I don't think I hurt Captain Connell at all. And there's no chance to try again.
Also, it was obvious from the messages what Captain Connell was planning, so there was no surprise for me (not the storyline "twist" you might have meant it to be). I had been expecting to fight him in the end for a while. It was anticlimactic to find a seemingly unwinnable boss battle that you can't repeat.