If you look back, I said Generac USED to have a bad rep. IMO this is from the Briggs days. Older Generacs (maybe two years ago) are NOT the same as the ones offered today. Generac is now owned by Eaton, and the units are MUCH better. They are identical to the currently available Eaton units. The older Culter/Briggs units were junk IMO, especially the vertical 7kW units. Their service was also TERRIBLE. Since the breakup of Cutler/Briggs things have improved tremendously.
The new Eaton/Generac is a new beginning IMO.
As far as portable units go, anything under the Briggs name is not what one would call high quality. Some of the portable Generac units fall under this as well unfortunately.