Awesome. Me and a friend of mine at work have been thinking of testing out XDP. We usually run a DPDK backed networking app, but for some deployments we pack a lot of different stuff together and in those cases it would be cool to be more kernel based instead userspace. It might also be useful for some cloud deployments (there are a lot of buzz around eBPF in those circles). We don't really know yet - it would be a bit experimental for us. Check out the newest and coolest and see if it would be preferable to our existing solutions in some ways.
Anyway, I had been looking for more things written by people that have used it - so thanks for writing down your experience. As you mentioned, a lot of what is out there is the most basic use-cases.