Product review (5 stars): Identical to originals
Aluminum mesh range hood filters sag and otherwise deteriorate with age.
Broan-Nutone are well-established brands,
and spares will likely be available for awhile,
but having replacement filters on hand,
e.g. to swap in while running one pair thru the dishwasher,
is not a bad thing.  The 30" Allure I (QS) series hood does not
flow massive amounts of air, even with clean filters,
so keeping filters clean is essential to adequate fume removal.