My used coach came with new tires (Chinese Dynatrac) and steering was vague at first. I was also a complete newbie to driving something that large. But as the tires wore in so did I. Steering is a non-issue now. Same for my SUV when I got new General tires (but the Michelins were great from the start). I suspect any new rig would be vague until the tires wear in.
If you use an electric heater (vs coach heater) it's much quieter but BE SURE to use a heavy duty 14 gauge extension cord (or plug in direct). Just because it's thick doesn't mean it's HD wire. My household (cheap) extension cord gets HOT at the socket and that's with the heater on 1/2 power! Don't let us read about you in the news.
Best,
- bob