I bought a Champion 100520 last year to deal with the PSPS in California, and other outages as well. I am totally happy with it! Always starts with the push of the switch, even if left to sit for 6 months. The starter battery holds it's charge well. I wanted inverter so as not to fry any of the numerous electronics it powers while on. Why take chances? If a device is operated on dirty power, excess heat can be made in the device, potentially damaging it.
At the time, I wanted a dual-fuel inverter generator, Westinghouse was at the top of the list. However, none that were CARB legal could be found anywhere I searched. No one would ship a non-CARB legal model to me in the Goldilocks State. It was a time of a dearth of generators that fit my needs for output and clean power.
When I saw the 100520 for sale, I jumped on it. It's gasoline only, to be honest I have not missed the ability to power it on propane. I am fortunate to have a source of ethanol-free gas nearby, and that is all I have ever used in it. Just recently we had an outage due to equipment failure. The tank was half-full of 6-month-old gas. I hit the start switch, it fired up instantly.
It's noisy, but not that bad. I run it near the house and can hardly hear it with the windows closed, which I do to keep exhaust out.
As far as hooking it into the house, I contacted two electricians to update my power panel to accommodate a whole house switch. They both flaked. So I made a suicide cord to plug the 240V into an unused dryer outlet, keeps the well and anything else (within reason) running just fine. I am beyond religious in disconnecting the house from the mains, and in never exposing live metal on the suicide cord. It requires mindfulness, but I've never had a problem. I will say that my main panel connects to the utility power via an ancient setup with cartridge fuses, so when I pull those I have very clear visual confirmation that the utility is disconnected.
Also needed using this method of connecting is turning the dryer circuit off when not actually transferring power from the generator into the house wiring.
Please, please do not use a suicide cord unless you fully understand what you are doing and why, and will always abide by the proper procedure to connect and switch things. It's just not worth killing yourself or others.
A good source of information on portable generators is
GeneratorBible.com - Leader In Portable Generators Stats & Comparison