I have to disagree with you, Built and Galadriell,

If you follow a system you want to monitor your progress, if for instance things don't work out like you expected you want to adjust until they do.

So unless you have years and years of time to try small adjustments and take a couple of months to see its 'long term' effect, you want to know sooner how you are doing.

Especially if you want to combine muscle growth with fat loss it is difficult to see what happens if you grow a couple of kg's.

Is if fat, is something wrong in your diet, is it as you hope, muscle?

In my personal case the belly is the thing not aligning with the rest, it is very important for me to know if I'm on the right track or not. Is it getting less, but still protruding in proportion, or is it NOT getting less. I still am unsure about that. If there is a reasonable way to know how my amount of fat is doing I want to use that!