IMHO, having instigated the stainless reed, it is the best. The performance is excellent, and I have yet to see one fail in any way. Mylar was an excellent choice for the RTF planes, if it started and got one flight, it was golden! After about 10 runs, the performance went to pot. Bronze reeds, as noted, work harden and eventually, I have even seen the center disc fall out! We used the stainless reeds on the Killer Bee and Venom, both running over 20K.