This.. was surprisingly the kinda stuff I watched and enjoyed as a kid. But as a teen, not at all. The acting is painfully bad, and the plot is a recycled piece of crap. They start out every episode happy, then oh no! A bad guy is causing trouble in the city. They fight him once but fail. They focus on one power ranger at a time for every episode to overcome that struggle, one to 3 dozen cheesy motivational lines later, they encounter their foe again. They beat him with what they learned, the foe grows bigger. They defeat him/her every time and turn to pose in their incredibly kiddish and poorly made CGI samurai mech as their enemy explodes. A very boring and predictable formula that makes very few variations between episodes. They change things up occasionally but there's no point cause you always know they're going to win. Not that every super hero eel movie/show doesn't do that but there are no twists, no good character developments, nothing. A very harmless show that is fine for kids but not great for teens/adults. But you'd be better off putting you and/or your kids in front of something like Avatar the Last Airbender, or Gravity Falls, or Star vs The Forces Of Evil.
Overall not the worst I've ever seen but far from the best.