Our new coach came with it and everyone got a good laugh as we showed it off to family, including us. Now it's a different story. First, many are fairly thin and really don't take up much space. We were looking at new coaches with my sister, who's looking to buy, and saw many in smaller Class A's that were inset mounted in an interior wall and really took up no extra space.
Here is why we like ours. In our previous motor home, we had a couple of space heaters. When needed, we would dig them out of a cabinet, connect and place in the middle of the room and try not to trip over them. They worked well for years and it wasn't that big of an effort to get them out, but often it was enough, in the morning, to go without because of the hassle.
Now, when it's cold, I just hit the remote and we have instant heat, no worry about the heater being in a safe spot and nothing to take out or put away.
Now in all honesty, the flames are okay and ours look very realistic, but I think a wall mounted electric heater with a remote could be a big seller.