In regards to the "jamming" peas, it was just temporary. The whistle still made noise, but there was no pea to make it "trill" and to my ears, the volume was lower. Sometimes it would clear after another blow and sometimes it would take two attempts. It always cleared, and I wouldn't let it stop me from carrying one of those whistles. In fact, I will most likely be equipping my SAR team with the Windstorm , which I find to be a good balance on performance and size after a few more tests.