Wadosan,
It's my opinion that Heartland does a good job of producing a quality product and Heartland provides very good customer service. I don't say that from the standpoint of having a rig that's never had problems. Rather I come from the place where when there was a problem, usually with an appliance or subsystem part, Heartland (and their suppliers) took care of me. In about 4.5 years of halftime living in the coach and about 1.5 years of fulltime, I've been able to rely on the coach and even when repairs were needed, I've never had to interrupt a trip. When we were starting out, this forum proved to be another great resource for Heartland owners, including me.
After 6 years of heavy use, I can say that we love our Landmark. And it might just be that Heartland did too good a job. Over the past 2 or 3 years we've talked a few times about getting a new rig but we always end up deciding that what we have is great.
But to one of your points, I have to admit that my viewpoint may be a little different in that having a rats nest of plumbing doesn't bother me at all. In fact, in order to deal with extreme winter weather, I've added heat tape and insulation to all my water lines which makes it look even worse. To me it's beautiful because it all works great and I have running water in the morning, even when overnight temps get to -30F. I've also added a CheapHeat device to the furnace, which added to the rats nest of wiring. But I sure love that CheapHeat.
But that's just me. I know other people have different viewpoints.