I've done multiple events now with my pals with 30Ks. In our experience, the mesh works as advertised. We did the Arizona BDR and had no problems connecting/disconnecting as we rode along. Mesh works great. Waterproofing is another issue as two of the guys have had water issues BUT Sena stepped up and replaced them. I had hoped that the minor styling differences with the 50S were tied to an overall waterproofing exercise. I haven't seen any evidence of that yet. I would jump to the upgrade program for 30K>50S if it delivered Cardo-level of waterproofing. I would also like to see ambient mode redesigned to use the main microphone instead of a pin-hole in the USB port. If the rubber cover is in the USB port, ambient mode is useless. I ride with custom earbuds and really appreciate the ambient mode.