Star Trek, the 2009 movie. Just watched it about a week ago.
I'd give it 3/4 stars. It was a good, likable movie, but there were some definite nagging problems. The plot overall seemed to have pretty good structure and I enjoyed following it, but I felt that it failed to properly build up to the climax. The suspense seemed very flat throughout the movie, then suddenly peaked at the climax, dulling the overal effect of that climax, making it seem somewhat anticlimactic. I also think the dialog could've been written better.
I did like the factual accuracy at least. There are points where obviously the movie couldn't make real scientific sense for what it was proposing, having to stick to what Star Trek is. But it was pretty obvious the writers at least did some research, beyond Googling a word and using the first description that comes up like most blockbuster movie writers seem to do. But I think even this was dulled at times by the dialog surrounding it, for instance when (spoiler: highlight to read) they exclaimed the 'alternate reality' coincidental aspect of time travel, something that I think anyone who grasps any understanding of time travel at all wouldn't treat in such a way. I think the dialog implied that the writer responsible overthought what reality even is and in turn just horribly failed to represent a proper reaction that you'd expect to see.
But aside from the issue of sometimes subpar dialog which tended to make the actors look as though they weren't executing it well, the acting was quite good. Certainly overall it was believable and enjoyable, and felt natural throughout most of the movie.
And of course, the special effects were top-notch.