No experience with the Westinghouse gen's. The dBA sure is low. Might check on the distance between the gen and dBA meter for the dBA rating. The percent of generator load at the low dBA reading could also be of interest. There are different methods and setups for taking sound readings. The web is a good source for this background study. How the generator is set (ground vs. within truck bed) could also impact the dBA reading. The light weight is attractive for using at home and other locations when not RV'ing. After purchase support (parts/service), especially when traveling could also be of interest. Could be worth the time to compare the Westinghouse gen overall (service/performance/cost) to Honda and Yamaha inverter type gen's. There could be a consumer type site that has published such data.
Bob and Carol - Lees Summit, MO,
2016 Silverado 3500 HD, High Country DRW diesel, 3.73 gear ratio, long bed, 25K Reese Elite removable hitch with 2013 Redwood 36RL with 17.5" H-rated tires and MOR/ryde heavy duty shackle links and bushings; 6.5 KW gen