1 of 1 people found the following review helpful
They work OK but I wouldn't rely on them.,
This review is from: RF-602 Wireless Remote control Switch & Studio Flash Trigger combi System for Canon Eos 1D,1DS,5D,5DII,6D 7D,10D,20D,30D,40D,50D 60D 70D DSLR Camera + 2 X Receivers (Electronics)
Purchased several a while back for use with speedlights and monoblocs. I have 1 transmitter that has consistently worked (which is bizzarre since the hotshoe is configured for Nikkon and I'm using it on a Cannon), and another that died after very little use (just picked it up out the bag and it no longer worked - after having worked on a previous shoot). Similar experience with the reciever units. Equipment failure for no apparent reason (and I do make sure everything is turned off prior to disconnecting them).
Summary. They may do the job, but I wouldn't rely on them for anything critical, and always make sure you have plenty of functioning back up units if you have no option but to use these.