I was going to add one to my kit. But then Jim got sick, a year of increasing issues then two years of chemo etc. Frankly it all happened at a point in my life where l was no longer interested in the harder core paddling that had preceded those events. These days getting my roll back on one side each season, used to have both, and assuring a couple of other reentry options is about as skillful as it gets. I choose paddle routes very conservatively on weather and on my own paddling fitness. Or lack of.
If l was still paddling like that l would have one though. Because we had a day where things ramped up beyond expectations. Happily was a salvageable disaster. But too damn close to a newspaper story, and pulling out an a wind meter at snack break would have given us information we should have had.
One of our crew Did have one in his forward hatch, pulled it out after we had landed. But sorry, do not recall the brand.