My wife and I stayed with these folks at the end of May - at first we weren't to sure. The building has a different feel to it. What I will say is
1.) amazing bar / restaurant
2.) the nicest people in the world! (I'm from Chicago, so...)
3.) an overall cool experience.
We drove down the enchanted highway and stopped at each of the sculptures (I believe the first one off the expressway is in the Guinness book of world records for the largest sculpture of recycled / repurposed scrap). On day 1, we ate at the local pub (there's only 1, so you can't miss it). Once again - friendly folks, great cookin' (and cold beer!). We also toured the many historical buildings there onsite. Wonderfully warm folks - it makes me think how different the world would be if we all treated each other as nicely. So the bottom line - Regent and the Enchanted Castle get two thumbs up. If you're passing through that part of North Dakota, don't miss it.