Yeah, it's sweet and well-made and all, but I'm gonna be something of a skeptic on this one. For one thing, I think there's something basically dishonest about a movie that has as its premise 'a man falls in love with a sex doll' and then goes to great lengths to make sure that its audience knows that there's no actual sex happening, thank you very much. The movie wants to titillate you but not creep you out, and as far as that goes it manages to walk that line but there's still a persistent denial at the movie's center that I find annoying. Basically, I wish that David Cronenberg had directed this.
My other real problem with the movie is that, as brilliant as Ryan Gosling's performance is, it's very heavily interiorized, which means that there's very little external conflict. The drama of the film is basically watching Gosling's Lars and waiting for him to come around and get with the program, and there isn't really much in the way of external drama to affect him or shake him up properly, which I would call a dramatic failure. We observe Lars without ever really feeling what's going on in his head (so I guess he's got something in common with Frank Lucas, for me).
Finally, there's a common trope in movies about romantic loners where there's always an unrecognized romantic possibility just around the corner. It's kind of a lame cliche.
(PS: I saw this movie a month ago but I'm writing about it now because I haven't had enough time yet to fully process No Country for Old Men and have anything interesting to say about it except that it's nice to see the Coens back again and the ending is odd. More later.)