Tried it myself at Printwear and promotion show 2016 stand on a single screen setup, it appeared easy to use, I thought that's clever and was impressed but its not cheap. It doesn't take up too much room though which was what I thought useful and why it caught my eye. That said. I decided screen printing overall needs more room than I can spare currently and for what it returns you need to produce an awful lot of shirts with screen print compared to vinyl so the space overhead, cost and mess of screen print put me off for now.
Mark