"A low price for brute-force cooling, but efficiency and quiet are not included."
The '10,000 BTU' is a lab-rated figure; the real-world cooling power is likely 35-40% lower, making its 'up to 450 sq. ft.' claim functionally impossible in most conditions.
This is a budget solution for temporary cooling in a small room (under 300 sq. ft.) where a window unit is forbidden or impossible to install. The low purchase price is the primary, and likely only, motivating factor.
Anyone sensitive to noise, concerned with electricity bills, or needing to cool a room larger than a small bedroom should skip this. A dual-hose portable or a basic window unit will be significantly more effective and efficient for the money.