First time buyers will think a built in generator is a plus. When looking for my camper that was the way i was thinking.
But this site and others made me rethink this. Plus the $1500 to $2000 savings for having a honda or yamaha. Additionally my RV buddy had a built in and it shook his camper and was Loud as Heck when running.
So ordered camper without gen and bought a Honda from mail order for about $900 ish. Much quieter and can take it off camper when is not needed and provide extra storage space. Wife now loves it as the generator cabinet can store extra shoes and other stuff.