It was fairly straight forward - only one hiccup that took some googling to figure out.
The bootcamp process creates a usb boot drive from a windows 7 iso and all the apple drivers it will need, and then boots from that usb drive to do the windows install. I was hitting an error where the windows installer said it was missing drivers it needed. I eventually found out that I needed to manually grab some intel usb 3 drivers. With that sorted, it was plain sailing.
Awesomes. Which one did you go for? (i5/i7, RAM, SSD etc.)
My 15" Pro is approaching 5 years old and is just beginning to feel old (2.66 GHz C2D, 8GB, 256GB SSD). I could get £500 - 600 for it on eBay. Combine that with an imminent bonus at work, 0% finance and the 5% discount we get at the Apple Store and I'm sorely tempted...