The fact that this is one of the better Marvel crossover events I've read in recent years is pretty damning for Marvel crossover events. Cause this is just OK. It's a combination murder mystery and Secret Avengers-style story about our heroes trying to figure out who murdered The Watcher and stole his secret-keeping eyeballs. 
 As murder mysteries go, this one is pretty lousy. The thread of evidence and investigation leaps forward without showing much about how anyone discovers anything, they just kind of... know stuff. Also, there are maybe 15 times where someone is about to reveal a big ole doozy of information and something explodes nearby, cutting them off and preventing the storyline from moving forward. It's weak as hell. 
 As for the Avengeriness of the story, that plays out fairly well. I love Jason Aaron's attention to character in this story, which is often something that gets dropped in these 12,000-character free-for-alls. The action and heroics are solid, and the whole moral quandary that comes into play is solidly explored. 
 But, that's just not enough to save this. Especially having read a bunch of the tie-in stuff. All of the tie-ins are linked to the fact that, at one point, a ton of The Watcher's secrets get broadcast into the brains of a ton of people in New York. I mean, can you imagine the kinds of secrets dude was keeping in that big ole head? Seems like they would be earth shattering! 
 But, they aren't. Except for the one in Hickman's Avengers tie-in (which is fantastic), they're mostly stuff like "Whoa, Charles Xavier left a will? Shouldn't he have just told us this?" or "Deadpool has a kid, which we already knew?" There's one that made me laugh about the Inhuman dog Lockjaw discovering that he buried a bone on the moon, which is made even funnier by the fact that this is about the level of secret everyone else is having revealed. 
 So, while the pace and writing are great, I can't really recommend this as a crossover worth reading. It doesn't seem like it has massive repercussions on the Marvel Universe at large, and kind of just feels like a little side-story only for the most fervent Marvel readers.