Not only doing a fine job of filming several heist scenes, The Town adds a nice dimension by throwing in the early stages of a love affair between one of the robbers (Ben Affleck who also co-wrote and directed) and the assistant bank manager he's just robbed (Rebecca Hall). Their meeting and subsequent entanglement seems plausible as are the motivations throughout this well paced and well shot film.
In a nutshell, Affleck's character was born into a life of crime, so he and his crew work for a mobster who provides the background info in return for a piece of the action. After Affleck's closest friend goes over the top and then makes a mistake on a job, Affleck starts to see the light that it's only a matter or time before something goes seriously wrong and they all end up behind bars. This revelation is furthered as he gets to know the bank manager (who he was covertly checking out to see if she could offer any info to the police). Through her he begins to see a reason to exist outside of the crime family, but (no spoiler here really) getting out isn't as easy as it seems.
A second, ill advised heist and subsequent chase scene are very well filmed - good tension without the Hollywood big - let's smash up a bunch of cars - chase scene.
The final heist however seems a bit absurd, as do some of the actions during the final confrontation, but the film banked enough really good stuff to allow me to ignore the final bits and still recommend this film, even if I wondered how the gang was able to procure those accurate looking police outfits. Regardless, the film holds several really nice performances; from Jeremy Renner as Affleck's best friend, to Blake Lively as Renner's slutty sister, to John Hamm as the FBI agent in charge - smart enough to figure out all the players, but then resorting to typical bureaucratic overkill that will allow Affleck the possibility to smell out a trap.
The film isn't without flaws, but is plausible enough until the end that you don't really have to suspend belief - all while providing solid entertainment.