Not the highest "grade" of camper, but would serve well if you take care of it, maintain it, not abuse it, and keep up on anything that needs fixing immediately. All campers require maintenance and constant attention to detail. Some just more than others though.
About winterizing? I agree with everyone else here. Winterizing takes all of 10 minutes or less and 2 gallons of "pink stuff" costs less than $5.00. Dealer should unwinterize it, and run all the systems for you BEFORE you purchase.
If they won't do that ... then walk from the deal and look elsewhere. And if YOU are planning a couple trips remaining this year, then yes... you probably want it un-winterized too, so you can use everything.
Not sure, where in the Midwest you are from, but most likely, you won't need to worry about winterizing until Early - mid November. Watch the weather station and when temps start getting below 32 during the day time, then it's time to winterize.