I ordered received this in Aug/Sept 2020 and it didn't work out of the box. It would light but not stay lit after primed. After working with the manufacturer's support staff they helped me determine it was a faulty tilt sensor (by bypassing the sensor). 

They sent me a new tilt sensor. It worked for about 10 times. 5hen a week ago the heater stopped working again. I bypassed the tilt sensor again thinking maybe a 2nd bad tilt sensor? Nope. Now, even bypassed, it won't stay lit without duct tape to hold the primer button pressed in (not at all safe!).

So... It's Feb 2022 when I could really use it. I got limited use out of this heater... it has worked as intended about 20% of the time.

A poor purchase on my part.