I have one of the Tanita scales; it's a few years old, but a relatively basic one with weight in .2 increments and body fat percentage.
I am not sure how accurate overall the body fat percentage is, but I basically pay attention to how it fluctuates, and when I was losing weight, it was making sure that number was steadily decreasing. Even if it's not accurate in an absolute sense, I would think it would be accurate in a relative sense.
I like having that feature because I know when it jumps way down all of a sudden, I'm dealing with water weight. More water in the body adding a few pounds means the percentage of fat is less, so I don't freak out too much when the pounds go up.
And now that you don't have to be perfect, you can be good.