Recs.
Updated
SpecsUpdate
Pros
Pro It's gigantic
There is so much to do in this game. Like, SO MUCH. Side missions large and small occupy the same time and space as the main story, making Gotham feel alive (despite its streets being populated only by generic criminals and most of its buildings being closed-off facades).
Pro A pretty great story
Takes inspiration from so many areas of past Batman lore and creates a more interesting interpretation of a classic story. There's some pacing issues occasionally and it goes on a little too long at points, but is more than redeemed by a compelling overall plot, excellent voice acting, and interesting characters.
Pro The Batmobile
Not everyone loves it, but - it's fast, beautiful, controls well, and converts into a tank for some combat missions that are almost as fun as the standard hand-to-hand combat. The moment when you rocket off a ramp and shoot a hundred feet into the air out of the driver's seat into a glide over skyscrapers... it's great.
Cons
Con Detective Mode investigation segments and the like are still boring and not good
Sometimes to push the plot forward the game will force you to do some "investigating," which basically comes down to a stupidly easy 'Where's Waldo?' minigame. It's not bad, but it doesn't really add much to the experience and feels kinda like a waste of time.
Con Lackluster, short DLC story missions
Don't buy the season pass unless you can find it on sale. It's not bad, but not worth an extra $20, and certainly not the $40 it cost before price drop. (FYI, you get a complete experience without the DLC - it truly is extra content, not main game content cut out and repackaged.)
Con You need to collect every single Riddler trophy/challenge to get the "true" ending
Some people don't mind the Riddler missions, but it can definitely become annoying for others.