Generator reviews tend to blur together after the third one. Same wattage charts, same “top picks” list, same confident tone. The useful ones do something different: they admit what the reviewer couldn't test.
When I compared notes with neighbors who bought standby units last year, three questions separated the helpful reviews from the filler. Did the reviewer own the unit through at least one real outage? Did they mention the transfer switch installation timeline, not just the generator? And did they talk about noise at 2 a.m., not just decibel ratings taken at the factory?
Sizing is where most regret starts anyway. A unit that's perfect for a 1,800-square-foot house chokes on a well pump plus central air. Before reading a single review, run your own numbers through a generator size calculator and write down the wattage range you actually need. Then check whether each review covers units in that range. Half of them won't, because they only tested portables.
Fuel type deserves the same skepticism. Propane stores forever but delivers less power per gallon. Natural gas never runs out during a disaster, unless the line itself gets shut off. Diesel gives the best output but goes stale without treatment. A review that recommends one fuel for everyone hasn't thought hard enough about your situation.
The honest shortcut: read reviews for the two or three models in your size and fuel bracket, ignore the rest, and weigh complaints more heavily than praise. Customers who lived through an outage with the unit they bought will tell you what the spec sheet never does.