I just finished up a very detailed and thorough review of the new Speedlite 600EX-RT. I used a combination of three 600EX-RT's in a variety of environments from weddings at night to sports in broad daylight with high-speed sync at 1/8000 sec.
In short, the new wireless radio system is pretty awesome and will save you money and time compared to many other the other TTL radio transmitters on the market. The new system has opened up many new doors for creativity and will simplify lighting for most photographers in general.
I think you will find the review quite informative so check it out and let me know what you think!
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