Product review (3 stars): it doesn't smell amazing but it doesn't reak to high heaven anymore either
Seem to help, I think?

We had a fire in our building and were kicked out for a week. Of course, by the time I got back I was greeted by a rotting pile of nastiness in my fridge. I'd never used one of these filters, but the fridge had a spot for it, and oh boy did the fridge stink.

It's been a month now, and, well, it doesn't smell amazing but it doesn't reak to high heaven anymore either. I don't know how large a role the filter played in that, but it seemed to help take care of what cleaning alone couldn't.