First off, let me say these air vent deflectors are a godsend for anyone stuck under a relentless AC vent. I tested them in my home office where the ceiling vent was basically a winter storm simulator. The magnets? *Chef’s kiss*—just press until you hear that satisfying *click*, and boom, no more icy drafts. They held up perfectly, even after my cat tried to swat at them (RIP my desk plant).

But here’s the catch: durability is a gamble. One survived my clumsy partner kicking it accidentally, while another shattered like glass when it fell from the ceiling during adjustment. The plastic is thin—great for weight, terrible for foot traffic or clumsy humans. If your vents are floor-level, maybe duct-tape a pillow around these.

Adjustability is hit-or-miss. They worked like magic on my 12-inch vents but required MacGyver-level tweaking for wider gaps. And while they *do* save energy by redirecting airflow (my heating bill nodded approvingly), the ‘unbreakable’ claim? More like ‘unbreakable… if you never touch them again.’

Verdict: Buy for magnetic convenience, but handle like a soufflé.