I bought the UK 10,000 BC when I was on holiday there in 2009. Went into a HMV store in Leeds, and I was like a schoolboy in a sweet shop. I was into DVD Steels at the time, and there were lots of the Definitive Editions on the shelves. I got a couple, but then I saw the 10,000 BC Blu-ray Steel for £10 so I bought it.
Movie is pretty average, but with no artwork inside, I found out how to insert my own, including the spine. It was my first effort, and wasn't a total success, but it was a good learning curve, and I have put artwork into seven more SteelBooks since, with much better results. I still have the SteelBook in my display.