It worked fine when we used it a couple of years ago during a planned power outage. Unfortunately, this one was out of the blue. And the generator was stored on an upper floor of the building - one that is served by a freight elevator. A freight elevator that wasn't powered during the power outage... :-/ We could have pumped up the tires and tried to roll it down the stairs, but we didn't have any gas for it, etc., etc. IOW, we didn't think about what would be necessary to use it in an unplanned outage.

It was an educational experience.

Fortunately, the UPS did its job, but it was running on fumes by the time the power was restored.

Cheers,
Scott.
(Who also has a small generator at home that was handy after a hurricane remnant blew through a few years ago.)