Two sailors jump off, and land in 1984. This is the major problem to solve, but in the movie it seems secondary, since it concentrates on one of the sailors and a woman who helps him. There is love, of course, so we know the end will be a happy one. The strong points are the visualization of how hyper-space will look and other effects which only seldom are overdone, as well as the tension in going to meet people you haven't seen in 40 years. The anti-paradox element exists, but isn't very important.
Many scenes are funny, where modern things meet old-fashioned people.
Some of those are what could make this movie worth seeing. Some parts are done too obvious, like one sailor asking the other if he has any money when they are having breakfast at a cafe. We who are used to such things have already figured out that it will be more expensive than they think it will be. On the whole, don't go out of your way to see this one, but if you happen on it, it most likely isn't a complete waste of time.