"A suspiciously cheap AC that promises quiet cooling it almost certainly cannot deliver."
The 8,000 BTU rating provides entry-level cooling power sufficient for a small bedroom or office, but the unit will struggle significantly to cool the claimed 350 sq. ft. living space.
This unit is for someone on an absolute minimum budget needing last-resort cooling for a very small, enclosed space. It's a purchase for someone who accepts that high noise levels and modest cooling are the trade-offs for the low price.
Anyone sensitive to noise, needing to cool a room larger than 200 sq. ft., or concerned with electricity costs should avoid this. The absence of critical performance specs is a major warning sign for a disappointing real-world experience.