I was 4 houses away from the golden kit for Choco in H, and 6 in B, so I gave in and spent diamonds to get the golden kit.
What's annoying is that In B I figured out that I had enough epic kits and already build nutcrackers to get the MSA every day. I didn't even need to spend the diamonds.
It was the first event I've spent diamonds on in I think ever. I had to tell myself, “The diamonds are there to be spent. Spend them!” But overall it was pretty good. I got the main building in both worlds and the golden Choco. I also got the Winter Retreat kit in both. Hoping for Bronze League in both worlds too, but I may end up in Amateur. I spent about 500 diamonds, so not too bad, and I got everything I wanted/needed. I'd say it was a successful event.