Over here, a generator is part of our emergency kit. In the event of power outage, it is necessary to keep the sump pump working or we risk flooding the basement year round. It is also necessary to keep the furnace & ventilation going. In winters sub-zero temps, we'd have to drain all the pipes in the house if there's no power for 24hrs of more.

Most brands have a reputation for reliability. We used an Onan 4500 gas unit for over 20 years with no breakdowns. Just regular maintenance, we sold it with the house. It was a godsend during the ice storm in 1998 ! Used it for three weeks !

We now use a Honda (quieter) but have yet to put it through a major test.

Establish your power requirements & get the best unit you can afford.