There we are; that's the rate of steam flow that I get. The system had only been activated for about 3 minutes before reaching this flow level. For perspective, I was sat on the seat at the far end of the enclosure; it's a large, self-contained shower cubicle. If you need clearer photos, let me know!
My initial thoughts are still that the fact it's a ceramic tiled shower room, the surfaces are so cold that it doesn't have much of a chance. As soon as the steam hits the top, I get a pile of condensation:
Regarding the temperature, it's warm, but it's not hot in the traditional sense of a steam room. I'm tempted to run the shower at full temperature for a while to heat the room up, then put the steam generator through a couple of cycles. Right now, I barely feel the effect.