Are they blackout or just room darkening?

Frankly speaking, this product is unable to blackout , and the dark color can be room darkening.Ordinary colors are only better than sheers（light filtering,Customers with high requirements for blackout please purchase with caution~thanks

Why is the color of the curtains i received a slight different color than the pictures on the website?

Yes, actually there is a slight difference in the color of the curtains due to different display devices, screen brightness, or light brightness

What are the advantages of this product

Lightweight and Elegant with Unique Design

Why did some of the glitter come off？

Because it is made on the spot, the amount of gold foil added is relatively large, so using it once or twice will solve the problem,Thanks

How many pieces in a package？ Are the panels 52W per panel or do they measure 52W together?

2 panels in a package. Each Panel measures 52 inches wide, so 104" wide total.