After testing the OLMO through-the-wall unit for 3 months in my sunroom, I'm impressed by its powerful cooling (12K BTU) and decent heating (10.6K BTU) - though installation required some carpentry adjustments since it's smaller than standard sleeves.

The R32 refrigerant cools rooms FAST - my 300 sq ft space hits 72°F in under 15 minutes. But be warned: at max power, it sounds like a jet engine (65dB). The heating function works surprisingly well for mild winters, though struggles below 40°F.

Smart features are a mixed bag. While the WiFi app is convenient after setup, pairing requires patience - I spent 30 mins troubleshooting the QR code process. The physical remote feels cheap but gets the job done.

Installation pro-tip: The included wall sleeve fits most standard openings, but double-check your voltage (this needs 230V) before buying. One user reported DOA units, but mine arrived flawless. At $660, it's priced lower than Carrier equivalents while offering similar performance.

Verdict: A solid choice if you need year-round climate control and don't mind some noise quirks. Just keep expectations realistic about heating capacity in extreme cold.