For the most part, I enjoyed playing Arkham Knight. It fixed some of the errors of Arkham Origins and provided a number of epic Batman moments. Batman's abilities and gadgets were on excellent display. I may even play the game again some time in the future. That said, I leave the game feeling disappointed.
My biggest frustration is the Batmobile. Because this was the first game that incorporated the Batmobile into the actual gameplay, I was looking forward to getting behind the wheel of this iconic vehicle. I was quickly disappointed. As a car, the driving was floaty and often unresponsive. Racing sections of the game were by far the most frustrating as they often required rote memorization of the courses and multiple deaths to find the correct path to victory (and this does not even count the optional trials). While I eventually adjusted to the learning curve and controls, I never enjoyed driving the vehicle. This almost is an unforgivable sin for a Batman game: to make the player hate the Batmobile.
Thankfully, the Batmobile also has a "tank" mode. Even though many critics hated this mode, I found it was the only saving grace of the Batmobile. While this mode also had a learning curve and its missions stretched my suspension of disbelief to its limits (Really, all of the vehicles it fights are remote drones? Where did all of them come from? And I'm sorry, but $3 billion might pay for one of them, not hundreds), the controls were much easier to handle and the gameplay was more interesting. This mode also made for some interesting puzzles and challenges that worked in unique and entertaining ways. However, it also had some terrible "stealth" sections and did tend to get a bit repetitive.
I am of two minds about the story. Without giving any spoilers, I feel that the first couple of acts were some of the most powerful moments I have experienced in any Batman title (video game, movie, or comic). Unfortunately, the middle section felt overstretched with only a few well done moments that unfortunately came after I expected them. By the time the story reached the last couple of acts, its "big reveals" were predictable (bothering me that I would figure them out before the "world's greatest detective"), a bit too unbelievable, and left too many plot gaps unanswered. In a way, it reminded me of the TV series Lost which began with such amazing potential only to squander it on an ambiguous (if clearly a conclusion) ending.
I am also disturbed that they decided to make this game a mature rated, rather than a teen rated game. This series has always pushed that line, but I never wanted them to cross it. While some of the reason for the rating is directly related to some of the more powerful moments in the story, I would gladly do without them to have a Batman game that I didn't have to shoo my boys out of the room for.
All told, I still recommend the game, just not as heartily as Arkham or especially Arkham City.