I use my Write In the Rain notepads with a Write In the Rain pen every day as a police officer. Through cold and hot weather, rain and snow. No smearing, and I have readable notes then, and weeks later. I'm not usually in super heavy rain for long periods of time. Personally, I haven't had any issues in the last year of use.
There was one short coming: it could be difficult to copy info from ID/DL cards, insurance cards, and other documents. Solution: Two paperclips on the outside rings (see pictures). Works great.