Sleeping lofts are a great way to maximise space. I really like this cabin with its one legged ladder but I dont know that I think much of that safety rail. Do you like it? Not the rail, silly - the cabin and sleeping loft!
This is beautiful. From the look of the kitchen island and the bar stools, the kitchen is likely to be nicely done as well. I like the loft for a guest room. I would also consider sliding barn doors as a separation for the bedroom.