BICC PVO for Sales Order and Customer

We need to extract the data for customers , items and sales orders using BICC. It extract should be used by DW.

If you have done these kind of extract, Could you please share the below information :

1) The PVOs used for extracting customers/items and sales orders. I understand we may have to extract additional PVO to map to user values with ID or DFF. Please share all the PVOs based on your experience

2) Any issues/challenges you faced

Thanks in Advance.