David Ayer's Fury is one of the few that warrants its length (or most of it). Brutal, punishing and exciting -- in that order -- Fury gives you an approximation of what it would be like to spend a few action-packed days trapped inside an under-equipped American tank toward the end of WWII.
Unfortunately, the script for this film is never sharp or savvy enough to counteract both the ick factor -- two grandfathers beating each other up in boxing trunks -- and just the simple lackluster quality of it all.
As a vessel for social change, Snitch is an unlikely but inherently plausible vehicle. As a movie, it's the kind of old-school star-driven studio programmer that used to be the industry's stock-in-trade.