"A budget-priced cooler for small spaces, as long as you trust the right BTU number."
The 8,500 BTU (ASHRAE) is a theoretical lab performance. The 5,100 BTU (SACC) is the Department of Energy's more realistic rating, representing the cooling power you'll actually feel after accounting for waste heat.
This is a viable option for a renter needing to survive a heatwave in a small bedroom or home office under 250 sq. ft. Its low purchase price makes spot cooling accessible without a large investment or permanent installation.
Anyone needing to cool a medium-to-large room, or who is sensitive to noise while sleeping or working, should avoid this. The unstated efficiency also means it will likely cost more to run than a comparably priced, but more effective, window unit.