First, let me get the bad out of the way as the bad aspect is short but the premise behind why I don't recommend: The crashing. The crashing is so horrific. This game crashed almost 30 times in one night, no matter the settings -dx9/texturestreamer/lowered settings/etc. The game just crashed constantly. I had so many saves that I was needing to purge/back-up my save directory. I was overwriting saves, creating new ones, rolling them back after a crash corrupted them - it was bad. I played for 25 hours, a good chunk of those were JUST restarting to get back where I was before a crash, only to crash again. It wasn't even all before cut-scenes. So with that in mind, and the fact that the "Quality of LIfe" update was JUST a launcher? No. I do not recommend this game on PC.

Now, that said, if you want to risk that - this game has a lot going for it.
Positives:
First, I'm confused about how we got here from the first game after the ending, but.. whatever. The story itself here is good. It was nice seeing the place again after everything we did.
The art is still really amazing and fits in so well with the environment.
Music is wonderful.
Writing is pretty good. There are some issues, but overall it was pretty decent.
Voice acting was largely spot on and the characters had great accents and fitting 'gentile' voices.
The mobs were REALLY annoying at times, but that's fine. I did not like how they'd literally spawn in right next to me, but overall it was pretty easy to play (I was in hard mode).
Weapons felt good, but I REALLY do not like that you can't reassign weapons and the plasmids just randomly go into whatever F1-F8 slot they wanted. Small critique though, I just changed the keybinds for 3 to be 8, 7 to be 4, etc.

This game had so much going for it that it's a great example of snatching defeat from the jaws of victory. If the devs had just put even the smallest amount of care into the PC port this game would have been amazing for years to come. They didn't. It's frustrating, I can't recommend this amazing game because it's just not worth the effort to actually be able to play it.

It's one of my biggest principles to write my review when I'm completely finished with a game, and the Bioshock series is more than simple entertainment for me, but the only problem with this game is the technical issues...

Firstly, older games don't have the habit of creating save files on their own, which the player must do occasionally before exiting the game.

Secondly, the game crashes all of a sudden, even if my computer is well-equipped to play this game, it crashes all the time due to a number of technical issues, and it's getting harder and harder to find a solution.

If you are determined to play the second game in the series, please do not buy this old version.

Playing as a Big Daddy completely ruined it for me.
Big Sisters is the only reason I'm not putting a lower fun score :D