My registers are on the wall not on the floor. They continually fell off. Did not stick very well at all. I was disappointed.

The magnetic covers seem to always fall off. I still have to try closing vents to ensure the air does not blow off the cover. I guess I was expecting a little to much for such a low price.

I bought these to cover up several ceiling vents (the packaging claims they can handle ceiling, floor, and wall vents). The covers are barely magnetized. I test them against refrigerator magnets, and the fridge magnets won by far. These covers do not stick to wall or ceiling vents. I don't think they do much better on floor vents than a heavy piece of paper would. Save your money.

Great idea. Easy to size & fit, but they're just barely magnetic. By itself it would not work with a ceiling-mounted vent -- even with vent fully closed the air flow blew the magnetic cover off.

I was a little disappointed with this product. We have our vents in the ceiling and it doesn't have enough magnetic strength to hold itself up there. However, for the price I paid that's what I should have expected.

If your vents are on the ground, I bet they would work spectacularly.