Just saw it, my thoughts
The movie's biggest upside is that Dennis Quaid is awesome as Reagan. When I first saw images of him as Reagan, I was skeptical because I was concerned that he didn't look like Reagan. When I watched the movie, however, I found Quaid to be convincing in his voice and mannerisms; and I think the film's crew did a fine job with the makeup and prosthetics. In addition to Quaid's awesome performance, I think Penelope Ann Miller is convincing as Nancy Reagan: she looks and sounds like Nancy. I love the visuals of Reagan's California ranch and the Oval Office. The closing image of Quaid's smiling on horseback, with a cover of John Denver's "Take Me Home Country Roads" playing, kinda hit me emotionally. At times, the movie can provoke 1980s nostalgia with the images and soundtrack.
That said ... the critics of this movie have a few valid points. The biggest criticism is that the movie goes at a breakneck speed and feels like a bare-bones cliffnotes version of Reagan's life. The movie attempts to cover all of Reagan's life, so the movie gives time to his job as a lifeguard, his days as a choir boy, his first marriage, his acting career, his time as the SAG President, his governorship, his time as president, and the onset of Alzheimer's. The result is that a lot of topics are left out altogether (e.g. Just based on this movie, you might figure that Reagan had no children). Of the topics covered in the movie, many are just skimmed over. For example, I feel as if I blinked my eye and missed Reagan's first wife (played by Mena Sevari); the topic of Grenada is covered in one line that Reagan says to Margaret Thatcher; and George H. W. Bush appears for about 5 seconds in a meeting.
The movie often cuts to newspaper clippings and historical clips to try to condense loaded historical events, and there is a frame narrative involving Jon Voight's character, an aged KGB. I like the idea of having Voight narrate Reagan's story, as his narration often helps keep the movie organized and allows the movie to condense some events. Voight could've worked a little more on his Russian accent, but it's nothing too bad
The other flaw, which critics have stressed, is that the movie is extremely pro-Reagan. I admit that I am a fan of Reagan, and I'm a Republican. So I'm not as angry about the movie's pro-Reaganism as many critics are. But even I have to admit that the movie's extreme pro-Reagan POV hinders its potential to offer historical insight or historical knowledge. The movie straight-up glosses over all of Reagan's flaws or mistakes. Even during its discussion of the Iran-Contra affair, the movie makes Reagan look like an unsuspecting and innocent party. I also found some scenes felt like campaign advertisements. When Reagan is giving a speech during his run as governor, for example, the movie shows several people (e.g. A waitress, a barber, and a man getting a shave) all stop what they're doing and stare at Reagan on TV as if mesmerized. This same scene basically re-occurs when he does the "Tear Down that Wall!" speech. Ronald Reagan in this movie is basically a one-dimensional, anti-communist patriot who almost never commited sin or error knowingly
The movie offers no drama, and there is little educational or historical value. And obviously, you should stay away from his movie if you dislike Ronald Reagan. But if you're a fan of Reagan, you will leave the movie feeling uplifted; Quaid's performance will be enough for you to overlook many of its flaws.