I havn't had enough opportunities to write a thorough review, but I can review a couple aspects.
First, it was probably our fault for going to Brothers at 11 p.m. on the first Thursday of Spring semester. But seriously... a 2-hr wait in line, no joke, is no fun.
What strikes me as fun about Brothers is that it occupies the 2nd and 3rd stories of a 3-story building. Part of the third floor is removed so you get a great open bar space which feels pretty roomy. The decor is bar-ish.
The bartenders were cute, and responsive to taking orders even though the room was pretty packed.
I agree with some of the other reviewers that the people here are kind what you'd expect at any frat party... but then again, this is a bar on Green St.
Drink selection is decent. Come for the unique bar setting, leave when you get sick of the people.