NEO's are gods gift to the west coast. I have tried wet weather boots, gortex socks and the old rubber gumbies, and nothing has been as practical as the neo's.
Pack up light in the ruck, slip on and off real easy, no need for an extra pair of boots, and the best, if you are on a long ex, sleeping in mod, bring a pair of crocks, they fit!
I personally did a full nights sentry shift with crocks and Neo's. No one was the wiser, I was comfy and the boots got a night next to the herman nelson to dry out.