"It sells on a BTU number it can't deliver, but the price is low enough to tempt."
The '14,000 BTU' figure is marketing based on an old standard. By modern government metrics (SACC), this is likely a ~7,000 BTU unit, suitable for a small bedroom (~350 sq ft), not a large living area.
Someone on a severe budget needing to cool a single small room, who understands this is a temporary fix, not a durable appliance. If you need spot-cooling for a single season and your budget is absolute, this is a product that exists.
Anyone expecting to cool 750 sq. ft., anyone sensitive to noise, or anyone looking for an energy-efficient, long-term solution. A standard window AC unit will provide more cooling for less money and electricity, if your building allows it.