Customers most agreed on the following attributes:
Great protection for my lens.
Great for protecting your lens and fits in my camera bag with no worries.
I bouthg this hood to my Canon 50mm f/1.8 lens. For that money works perfect. And it's foldable.
Own both 52mm and 62mm to cover three different lenses. Have replaced metal hoods. These cost 1/3 as much. But big advantage is not cost, it is space. Each saves 1-2 inches over fixed hoods that are not reversable. Can be left on lens and folded back...I've picked up enough room in my Domke bag to pack two additional small lenses just from using these in place of the metal hoods.
Terrific accessory.
Works exactly as described. Lightweight and adds a small amount of protection against small bumps to the front of your lens. It won't protect it from a fall to the floor, but it shields the sun well and folds to a very small size.