This article really got me motivated. I am building an HO scale layout on a door (36x78), and this really showed me what can be accomplished in such a small space. I know, before anyone says it, that N is more suited for that space. I tried N and ended up selling it. But anyway, I am glad to see such an odd layout featured in MR.
Nothing wrong with small spaces and tight turns as long as you realize the equipment limitations. The problems usually arise from folks trying to run long locos and cars on 15" curves.