A lot of people love this adaptation of Jack Reacher, I am not one of them. Its been a few years since I read the books. But I feel they changed the tone of the first novel quite a bit.
They changed some fundemental things about Reacher. He does not have the soul of Reacher. He isn't cocky, he's confident. He doesn't show off - he doesn't need to. Also, the fights are inconsistent (stupid pipsqueak fight and alley dude that had his arm broken twice). Reacher isn't the Sherlock Holmes as he was in the books, rather a jock that just figured out how pythagorean theorem worked and couldn't wait to tell everyone.
The story is incoherent, much more incoherent than in the books. You get muddled with names, cow feed, cities, etc... a big mess. The showrunners are not very good. They had 8 hours to adapt a facinating thriller and failed. This is what sets them apart from the great Christopher McQuarrie, who crafted an awesome Jack Reacher story in under 2 hours.
The scene where Joe and Jack visited their mother for the last time, they reversed the roles of Jack and Joe if I remember correctly. I think that event occurred in "Night School"? It was one of my favorite, they didn't have to change it.
A big 'Meh'. I hope they don't make a season 2. If they do, I hope they hire better writers.