From what I have heard, it might not be so much that the bodyfat scales are innacurate, rather that they are innacurate by varying amount depending on factors like, e.g. how hydrated you are. So they might be out by 2% one day and 5% the next and then accurate the next.
If you can't be arsed with the caliper thing (and to be honest who can) then they are probably better than nothing, but I wouldn't take them as gospel.
From what I have heard, it might not be so much that the bodyfat scales are innacurate, rather that they are innacurate by varying amount depending on factors like, e.g. how hydrated you are. So they might be out by 2% one day and 5% the next and then accurate the next.
If you can't be arsed with the caliper thing (and to be honest who can) then they are probably better than nothing, but I wouldn't take them as gospel.