On December 28, 2019, when I purchased 4 panels of the curtains, they were $54.99 each panel.  I thought that was a bit high, but decided to get them anyway. Today, January 12, 2020, they're $39.99.    
May advice would be to wait for the $39.99 price. 
The white portion is only white across the top and edges (hem line). The majority of the curtain is gray, due to the black out portion.  
 I like the curtains.  The style and weight are nice.  They do darken the room.
I would like for white to mean white.  The knots should have been tied...you'll understand if you purchase them. Hint: just tie a knot and don't worry about the directions.