I just read part of a review:

Jack Reacher is an old-fashioned type of guy -- he doesn’t use a cell phone or credit cards, he travels by bus -- and the first film adaptation of one of Lee Child’s Reacher novels has a correspondingly gritty, low-tech, real-muscle appeal. Tom Cruise might not be the 6-foot-5 rock described in the books, but he makes the title role fit him like a latex glove in a winning turn that could spawn a popular new franchise for the star, if public reaction to Christopher McQuarrie’s film is as strong as its fun quotient warrants.

review web page

They postponed an early preview because of Sandy Hook and have pulled one particularly violent trailer.