I had fun, but what the article in this thread is talking about is a 'holodeck' feeling. The uncanny valley is where the space between where your brain registers the image as imaginary and is ok with it (3d cartoons) and where it rejects the image as if its offended at being lied to (polar express).

The rift is very much in the former, my brain knew it was a game.

Genuinely though, I found it a far less engaging, far less immersive experience than a normal 2D screen. Maybe the later models are better, I don't know, but I definitely don't see what the fuss was about.