UI feedback for a complex web form [on hold]

I am working with a complex system which will have a lot of different long forms.

I did this first prototype and I would like to know what you think.

Thanks.

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I updated the design adding the collapsed sections. Also, for the completion bar, what I am doing is using color, blue for the parts that have been completed and light gray for the ones that are uncompleted. When the user mouseover over the bar will reveal the exact completion percentage.