Had a chance to play Lost Rail in late May and enjoyed it as much as everyone else who's posted here. During my 4-5 days in Nebraska other golfers were all curious about the stretch from the 7th green thru the 10th hole - as there seems to be a lot of chatter about this portion of the course being jammed into a small corner of the property. I loved the dual green 7th - it makes for a very challenging approach. I hit my two worst shots of the day on the 8th and 9th tees so I don't feel qualified to comment on those holes as I failed to play them properly. They certainly looked nice. But I can see how the 9th in particular could be polarizing.
Still, a big and brawny course that was entertaining throughout. My favorite holes would be #2, #5 (the Pasatiempo style par 3 referenced above or in a different thread), #13 (which reminded me of #17 at Dismal Red), #16 and #17.
I'm a complete shill for prairie golf and Nebraska golf in general, so I was an easy mark at Lost Rail.
Of particular interest to me from a design perspective was just how many of the holes were broken up by gulches or chasms of some other kind. These gaps didn't impact club selection too much (#9 is the only time driver was not an option) - but based on my memory the following holes were all broken up by a ravine of some kind that dictated strategy to at least some degree: #2, #4, #6, #7, #9, #13, #17, #18.
I enjoyed these features and to me it never felt like "target" golf - there was usually plenty of width and options for moving the ball around.
Anyway - I echo the endorsements of others on this site - if you get a chance to play definitely go visit. A fun time.