Product review (5 stars): Cheaper than big box store
These are pretty much required if you are stuck with a non-vented range hood.  Because of the inside wall placement of our cook top, the only way to vent a hood would require major work and cost. Maybe when I win Powerball, I can renovate the kitchen.  Ha, forget that, I will walk away from the house when that happens, shouting so long suckers...  But since I'm too cheap to buy a ticket, and an overeducated, lowly paid chimp to boot, no way that's happening.  Anyway, these work well to capture the splatters better than the aluminum mesh panels alone (these are installed on top of the aluminum mesh, so I may be stretching here).  As for odor removal, they probably do not contain enough activated carbon to completely remove odors, but do seem to help some.  Cooking is about the smells, too, so why hide them.  If it smells as bad as Durian fruit, you better cook and eat it outside.  I figure they may help keep grease out of the hood interior, too.  The cost is much less than the big box stores, so a no brainer purchase from Amazon.  Recommended for tightwads like myself.  Probably need to replace on a six month basis.

Followup from January 2014.  I have not replaced these on a six months basis (too cheap).  Still works fine, so my review stands.  If you happen to have the same Broan hood that takes four halogen bulbs, I also suggest the following LED bulbs as a substitute for the hot and less efficient halogen bulbs,&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Lighting-EVER-5W-GU10-LED-Bulbs-50W-Equivalent-Warm-White-Recessed-Lighting-Track-Lighting/dp/B008OCAST4/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Lighting EVER 5W GU10 LED Bulbs, 50W Equivalent, Warm White, Recessed Lighting, Track Lighting</a>.  These bulbs fit with a little adjusting of the fixture (there are screws holding each bulb socket in place).  I have had these in place for six moths without issue.