Let me start by saying this deflector is a mixed bag. The plastic quality is exactly what you'd expect for the price – not premium, but definitely sturdier than those flimsy acetate sheets sold elsewhere. I installed it on my bedroom AC and it does the basic job of redirecting airflow.

The retractable design (56cm-106cm) is clever – it fit both my window unit and wall-mounted AC after some adjustments. However, the "hollow waterproof" claim feels exaggerated. During heavy rain, some water did seep through the gaps when installed on my window unit.

Where this product shines is child safety. As a parent, I appreciate how it prevents direct cold blasts on my toddler during naps. The angle adjustment works decently to create softer air circulation patterns.

Major warning though: Like one reviewer mentioned, improper installation can block too much airflow. I initially positioned mine too close to the vents and my room stopped cooling properly until I readjusted it.

Final verdict? For under $20, it's a functional solution if you manage expectations. Just don't expect luxury materials or perfect performance with high-capacity units (2 tons+ seems problematic based on reviews).