The Nexus definitely looks like an interesting coach. High-end amenities in a smaller, more maneuverable package is something that seems to be missing in most manufacturers' lineups (the Tiffin Breeze at least originally started out to be that kind of option, but doesn't seem to have gained enough traction for some reason).
Here's a link to the thread here on iRV2... read through it and you'll get WillandJane's input on their purchase experience. They're currently driving back to California from Indiana doing their "shakedown" drive and will most likely have lots more input as they go along:
Nexus diesel pusher
The only odd thing I've seen in the discussion that sounds quite right (and possibly a deal-breaker for a full-timing coach) is that WillandJane said the instant-hot water heater was 110V electric ONLY. So no hot water for showers/dishes unless you're hooked to shore power or running the generator. I'm hoping they're just missing the switch that would turn on a propane or diesel heat source... but if not, that would be a must-change item if I ordered one.