Product review (4 stars): Could be more rigid. Seems OK for what it does.
Don't really know how it will handle smoke or smells on my ventless hood yet. Installing it, you have to be careful, the frame of this filter is so flimsy or flexible that even to remove the plastic shrink wrap I had to be careful because of flexing, I could see how someone who aggressively opens this wrap could fold the whole thing in half. Installed, one of the edges is bent a bit and I didn't like how it locks into the fan housing. Seems to have a less positive lock than the screen that came with the fan.
With that said, I am sure that this filter is expected to be disposable so based on this, I suppose it shouldn't be expected to be as sturdy as a cleanable filter should be.