So I've finally had some time to put the NeoPixel together. It required some fiddly soldering to attach the 4 pieces together, and then some more fiddling to get the code right – but pretty straightforward really. It's a very cool piece of kit. The LED's themselves are super bright, and as they are 'smart', they can be addressed individually which means you can make each one do separate things in any order. I've had a go with some simple routines, and I've also put together a RTC breakout component which means I can use it as a clock!