This, of course, is just my personal opinion but I thought it was really, really good. I'm not a movie critic nor insider. I came into it super sensitive to the impersonation concerns and honestly, I didn't think it detracted from the movie at all. Funny enough, one of the RT critics mentioned the actor was too short to play Stewart. I didn't really notice but it was the first thing my wife noticed. It was one of the better movies I have seen in awhile. It was clean and engaging. I highly recommend. I am a fan of Jimmy Stewart the actor but bigger fan of the man. The movie connected with me. That being said, my wife and I were the only two people in the theater that was not collecting social security.