We bought this a month ago and have used it a few times while camping. It powers our 31-foot trailer and we have had no issues. It is simple to start and is fairly quiet. It runs everything we need - microwave, air conditioner, fridge, and lights. It could not power our air conditioner and microwave at the same time - but this is not a big deal for us. The displays (Fuel Level, Power Output, Remaining Run Time, Voltage Output, and Lifetime Hours) are easy to read from a distance. We are happy with this purchase.
Like many other purchasers, the automatic choke did not work, as the electrical connector was unplugged. Once reconnected (as video on YouTube shows), the Gen4500 worked flawlessly.