While using most potable inverters, I suggest monitoring the temperature of the unit and keeping it away from anything that can burn. An inverter will generate heat, that's normal. Excessive heat can occur if the internal components are not rated for continuous high heat and cooling is not adequate.
What happens when the upper heat limit for the unit is exceeded is that insulation can melt and even catch on fire. In addition, the inverter can start sending erratic and dirty electricity down the AC power cord and impair or even damage the devices being powered.
Inverters of this type often have a reset on them that will trip the inverter off if there is a high temperature. If this occurs, let the inverter cool down and remove some load before resetting.
I've professionally used lots of inexpensive electrical powered devices of various types types largely in field conditions. In fact, I completely abuse and sometimes destroy them. And that's fine. Determine how hard you'll run it and for how long then apply your value judgment whether to go with disposable gear or more expensive durable gear.
You’re right, of course, this is a temp unit, not for continuous use. I used it to inflate an air bed inside a tent at the lake (wife won’t sleep on the ground). Worked fine but will drain your car battery if you use it continuously. For limited use only, but much easier than carting around a gas generator.