I was skeptical at first, but the sheer curtains i bought for my home didn't blockthe cold coming through the window panes in the colder months.  This liner added another layer without having to buy all new thermal curtains.  They are good quality, room darkening as well, hang with pinch pleat, grommet, tab, and rod pockets.  Directions for all included.  There are four rings included for the grommet or tab hanging, so i spaced them accordingly when i hung them this way.  I thought i might have had to purchase metal shower curtain rings, but this was not necessary.  I recommend this product.  I purchased 10.  One of my windows is a wide picture window however I still only bought two panels for this window.  I spaced the four rings further between tabs and it hangs nicely.