Review on Wireless Flash Speedlite with Radio Slave for Canon - YONGNUO YN685 - GN60 2.4G System with ETTL and HSS Capabilities by Rory Stice

Love this flash, I've had 5 in the last few years. They work very well and the trigger system is fantastic. I had to replace a few to make it my fault. However, newer batches suffer from thermal protection problems. This is the second flash in a row I've bought that suddenly goes into thermal protection mode and won't come out no matter what you do. This basically renders the flash inoperable. I replaced both under warranty but it's hard to trust these flashes on set as I'm a professional photographer. Luckily for me it's useless to have more flashes on set than I need, but that's been a big problem lately. I hope my next one doesn't have this problem.