I have the 2 Honda 2000i with the parallel kit. Both are over 10 years old. They both sit for 9 to 12 months without being started and no fuel stabilizer used. Each will start after a couple of pulls and run all day.
From time to time I will forget to open the gas cap vent, this makes it tougher to start and the generator and it will only run for a short time. Open the vent and all is good.
I bought these because they were quieter than any other 2000 watt on the market at the time. I would definitely by Honda generators again when needed.