I have an ETQ generator, which has served me well. Mine is a two stroke gas mixer. Amazing, how quiet it is. The one time I needed it, it ran a furnace for a friend of mine, when his power was off, in bitter cold winter. Mine was about $150, delivered to my door. You can buy a lot of gasoline for the $300 price difference.
Most cheap generators like mine, and like the one you linked. Are designed for about 200 hours of runtime. Then, they are too worn out to do much good. In my case, mine has about five hours runtime, since
2005, was it.... ?? when I bought it. Can't remember.
Propane appliances are supposed to run a lot more clean than gasoline. As Mr. Ransley mentioned, natural gas generator is worth considering. If you have NG, and if the NG is dependable, in your part of the world.
How often is the power out? Do your neighbors have generators? Generators are a high theft item. And they can be noisy. And your neighbors may be jealous, and take it out by damaging or stealing your generator.