I just bought a quailridge park model, literally a few weeks ago. It's my 2nd unit.
Quality is pretty typical Forest River quality. Luckily campground owner is an actual dealer and doesn't charge a markup. He prefers people put park models at his campground, it's actually a great business model.
If you're going to order, get the order sheet, read it once, twice,... TWENTY times. Make sure you understand each and every item. Look at photos at dealers, at Forest River, and customers. We got a 39UKL and IRC specified prior year kitchen layout, and flipped the design end for end.
We are putting a 400 sqft add on room doubling our space. Spent a lot of time designing the layout of the room to fit our needs. This will be our retirement home. We hope to travel 4ish months during the winter. We poured enough concrete to land a 747 on, and then sealed the cement under the trailer and addition. We have an external "package unit" HAVAC that is hard plumbed to trailer and addition. We're still in the midst of a massive construction project, and had to leave our prior model... something about the new owners wanting possession.