Crutchfield Customer Review (What's this?)
Simple to install on the speakers. Keep in mind that you only get the grills and no mounting hardware. They seem to have been designed as an accessory to a prebuilt/prefinished sub-box. Bottom line it was worth protecting the speakers.
Pros: Helps to protect the speakers. Well made.
Cons: Price is for each grill and not a pair, so it gets pricey.