My good friend and I purchased two of the 5568 models. The store had just received a truckload of generators. They were very expensive, but with our area of SW FL just missed being destroyed by Hurricane Ian and out of power for 4 days, we bought 2 and returned to our homes. Set up units in carport areas and ran extension cords for fridge, freezer, some lights, fans medical equipment, phone chargers, etc. They worked extremely well, but are very loud. Was not aware that these units are designed for commercial applications, job sites, etc. until more research was made. All sorts of generators were running throughout our small community. Run time on a full tank was very good, nearly 12 hours and the Honda engine is always a plus for my friend and me when purchasing gas power equipment. So, long story short a very nice machine, very much worth the expense and has a CO sensor that shuts down the unit, if detected. It's very well built