We have a 2018 Hawk with the Overland Solar panel/controller that they had just started using, and we have the biggest fridge they offer. We also got dual 6v batteries. When we were planning out purchase, I think they were using Zamp solar equipment which got mixed reviews and was heavier. I planned on installing solar on my own to save some money, since the FWC pricetag is a little steep. But when we were at the showroom, they told us they had switched to Overland Solar, and that the panels performed better and were lighter. We decided to just pay for the solar to make things easy.
I have been really impressed with the overall power system, and we have camped in four seasons now, from a smoky summer trip to Idaho, to freezing night in Great Basin, to a night in a snowstorm on top of Mesa Verde, to a 24 hour rainfest in Humboldt Redwood SP during The Norcal Storm of 2019, and everywhere in between. We were at Lake Pilsbury a few weeks ago. It was somewhat warm, but overcast for the first two days. I was worried that with all the "hydration" we were doing, and the sun being absent, that the fridge would have sucked the batteries down. At the end of day 2, all four lights for the charge level still came on. Even though you didn't order solar, you will probably want to add it at some point.
As for the furnace (I think it's an Atwood? Whatever they were installing in 2018), we have been pretty happy with it. We have done a lot of cold weather camping and have used it a lot. We have spent quite a few evenings in the camper listening to audio books or podcasts and can do so comfortably with the furnace on. It does make some noise, but it is completely tolerable. Have not had any problems with the function of our furnace, and I have been surprised at how long the propane lasts when using it a lot. We will run the furnace all night and not have any trouble with the noise. I try to be conscious of the exterior noise, but I would only be concerned if there was a neighbor on that side of us in a tent. It probably makes about 1/10th the noise of all these generators that people feel like running all the time.