Most of my group has the Vevor.
easy to use and pretty quiet. Fuel usage is minimal. I think I use just over a quart if I run it all night on low. "If" your luck enough to get a working thermostat, it does you no good if the controller is mounted to the unit (all in 1).
Across the board, the biggest complaint about the cheap ones is some features on the controller don't work. Everything you actually need works like fan speed, on/off, priming. Clock, thermostat, timer.... is iffy. With mine, its perfect on low fan and I have my controller remote so I can change fan speeds or turn it off if need be.
I think some of us are working on close to three years with only one having issues. Just an odd bug in one of the units making it useless.