I have played the Call of Duty: Infinite Warfare Campaign for about 2 hrs, and I have enjoyed it a lot more than Black Ops 3.

Maybe it’s because the protaginist are human vs half man-half machine like in Black Ops 3. Or maybe because the story is just better and the characters have way better personalities.

In Infinite Warfare, there are several times I laughed out loud at Ethan’s quips and the various charactor interactions. There is a character called Gator. If you have seen The Other Guys, you will know why this is drop dead funny. Intentional or not, it is hilarious. 

The game looks and plays great. I average around 55 fps on max settings in 2560 X 1440 resolution on my I7 4790 with a GTX 980. So, 60 fps should not be a problem at 1080p. Even if you have a weaker PC, a few display adjustments and you should be there.
The guns sound, feel and shoot great. I dont have a favorite, I love em all.
So, a big thumbs up for Call of Duty: Infinite Warfare campaign mode. A+ so far.