Product review (3 stars): It does the job
I had another brand that I used for 10 years but screen finally broke. What I like about this one is that the screen comes off more easily than my old one (that is sold by a national hardware chain). What I don't like about this one (that I liked about my old one) is the quality. There are gaps in the seams so not all of the dryer exhaust is directed by the Heat Keeper, some leaks out the seams and some leaks to outside. Another criticism that I have is that the screen is not very fine and for some reason is harder to clean than other dryer filters.

Neither this device nor my old one does a great job of containing dust and lint. While a lint catching bag might be able to be tied over the exhaust on this one, I haven't tried that. I'd really like to see a device like this that, when used to keep heat in the house, would filter the dryer exhaust through water. There must be a cleaner solution to keeping the heat in the house.