Product review (5 stars): It filters air. In the kitchen. From the stove.
This is a good filter. It takes the nasty smells out of the air coming off my stove.

Actually, shortly after installing this, my son - in an effort to be extremely helpful - melted a plastic wrapper onto the glass cooktop of the stove. This took the smell out of the air pretty quickly, so that's a huge plus.

One slight issue is that it doesn't match the picture - the filter I received was black, not blue. It doesn't matter much to me, but if you wanted a blue one because that's some special material you really want... probably look elsewhere?