I’ve had an ultra cheap Eaton 5E (900 VA) for a few weeks. Because I still don’t entirely trust it, I’ve tried cutting the power to it several times (like 10x maybe) and it’s been fine every single time (it talks to a Debian box with NUT). The whole thing was around $80, if it doesn’t burn the house down, there are no downsides.
We have an Eaton and several APCs, all fairly cheap/lowend. One recent power outage, the APCs flipped on but the Eaton just turned off...