"A suspiciously low price for ambitious cooling claims that physics will challenge."
The 14,000 BTU is a theoretical lab rating. In your home, this unit's single-hose design means it will perform like a smaller, less efficient air conditioner, making its 750 sq.ft. claim unrealistic.
This unit is for someone on a strict budget who needs temporary cooling for a small room (under 450 sq. ft.). If the absolute lowest initial price is the deciding factor, this is a contender, with the understanding that performance and longevity are gambles.
Anyone needing to cool a large room, living in a consistently hot and humid climate, or sensitive to noise should pass. Buyers prioritizing energy efficiency or expecting multi-season reliability should invest in a unit from an established brand with a published SACC rating.