Gah. Just lost my long-winded post.
Anyway, I just finished marathoning the game today in honour of the long weekend. I have mixed feelings about the game, overall. I loved the combat of the game. The vigors are great, and the guns are mostly satisfying. I've heard that auto-aim on PC is turned on by default, but I'm not really bothered by things like that. In fact, I probably enjoyed the game a bit more because of it.
My favourite combo in the game was to start off encounters with Shock Jockey, then clean up with a headshot from the Combine(or just splatter them with the shotty). This works exceedingly well(especially with auto-aim) once you get the ability to chain lightning. Possession was a lot of fun; I love having Patriots mow down their own teammates.
I've read a lot of reviews that have complained about some pacing issues, specifically padding in the midsection(don't we all have that problem?). I'm inclined to agree, though I think the problem extends through the end of the game. To me, encounters felt a lot more like encounters from Uncharted/the new Tomb Raider. I also took issue with the forced backtracking in some areas. Fighting Elizabeth's "mom" was particularly bad in this regard. Perhaps it was an issue with the order I was doing things, but I would go through an area, kill the bad guys, reach an endpoint, have to go back through the previous area, and fight another group of bad guys.
Anyway, how 'bout that ending, eh? It's strange, to me, every major development in itself isn't really shocking. Maybe that's because every review has done it's best to remind you of the OMGWTF plot twist(sort of like watching an M. Night Shyamalan movie), so you're mentally prepared for it. But honestly, all those developments were, at one time or another, considered possibilities in my mind.
Any time you introduce alternate universes and time travel into a story, you open yourself up to plot holes. Personally, I tend to gloss over the plot holes and try to look at the overall outline of the story. Movies and videogames are much more enjoyable that way. Infinite is no different. My favourite part is the pinky incident, even though by that point, it serves more as confirmation of the major plot point than as anything revelatory.
Anyway, TLDR. Great game. Though it was tough at times playing with a wireless keyboard/mouse that are running out of batteries.