I found the first volume of Brian Michael Bendis' New Avengers to be above average, but not great. In my opinion, it was no Runaways or Astonishing X-Men, but it had its merits and from what I've heard about the series, I decided to continue. Fortunately, I found these next four issues to be vastly superior to the initial arc.
The first arc was the origin story of the New Avengers, and while I've read some killer origin stories, I found this one to be a little slower than I'd prefer. However, now that the second arc has begun, Bendis can immediately throw the Avengers into action and he has mysteries from Breakout to wrap up. After over 40 supervillains escaped from a maximum security prison, the Avengers are still trying to clean up the mess, and we see them deal with the Wrecker, one of the escaped villains (and a Runaways reference is thrown in, which always makes me happy). Meanwhile, Iron Man/Tony Stark brings up the possible problem of the Sentry to the Illuminati, which is a group of some of the most powerful, intelligent, and influential men in the Marvel universe. Sentry was in the prison as well, but he was there because he requested to be there. He is extremely powerful and claims to be a hero, but after the supposed death of his wife, he turned himself in.
The New Avengers, along with the Fantastic Four, the Astonishing X-Men, the Inhumans, and Dr. Strange, have to find out the root of Sentry's problems involving his problems and the source of his perceived insanity, especially when they learn his wife is alive. When the heroes learn that a comic book writer (who is a real-life comic book writer) chronicled the adventures of Sentry, a whole new set of questions are raised.
Overall, I really liked the Sentry arc. It did focus a little too much on Spider-Woman/Jessica Drew and Iron Man while ignoring most of the other New Avengers (Emma Frost was more integral to the plot than most of the rest of the Avengers team). The only other problem is that there are only four issues in this hardcover (plus a set of files detailing the 46 escaped criminals), but that that obviously isn't story-related. Still, this is a good read.