Works well. Blutooth interface is a bit wonky, but once you get the hang of it, it works.
This heater uses notably more fuel than my other (upright) 8k heater. Not sure if it's putting out more heat, or if it's a setting. It's kind of hard to tell what the setting is - would be better with a simple Low/Med/High instead of the multiple numbers.
Customer Service Reply:
Dear valued customer, thank you for bringing your concerns to our attention. We genuinely apologize for any inconvenience or frustration you may have experienced. To assist you further, we recommend visiting our "Contact Us" page on our website, where you can reach out to our dedicated after-sales team.
https://www.vevor.com/pages/contact-us
Manuel 
