As noted by other IMDb users here, "Certain Fury" is essentially an updating of the Sidney Poitier / Tony Curtis movie "The Defiant Ones", though changing the sex of the central characters as well as adding gratuitous exploitation material. Nothing really wrong with that idea, at least if you are as big a fan of exploitation movies as I am, but the end results are only partially successful.
The movie gets off to a great start, being swift and packing in much exploitation and other good stuff. Though after the first thirty or so minutes, the movie becomes greatly uneven. There is some good stuff to follow, but they are bright moments lost in a suddenly slowing storyline. The movie almost gets boring at times because of this. Also, the ending is kind of weak, written and directed in a way that seems to come out of a much more serious movie than this.
Is the movie worth seeing? Well, if you are a patient fan of B movie exploitation, and you can see the movie cheaply or for free, then you'll probably get a reasonable amount of enjoyment out of it. If not, you'll probably be in the title state long before the movie reaches the ending.
