Had a chance to put the FJ 400 to the test with my Canon ST-E3 RT Transmitter at PhotoPlus last Fall. Everything worked as advertised. Being able to use one FJ 400 as a Main Light (more power) and incorporating smaller 600 EX-RT for fill for example is nice to have in your tool box.
For those that have purchased, how has the reliability been in the real world, albeit it Six Months?
Canon 5D Mark III (x2), BG-E11 Grips, 7D (x2) BG-E7 Grips, Canon Lenses 16-35 f/4 L IS, 17-40 f/4 L, 24-70 f/4 L IS, 70-200 f/2.8 L IS II, 70-200 f/4 L IS, 70-200 f/4 L IS Version II, 100-400 f/4.5-5.6 L IS Version II, TS-E 24 f/3.5 L II, 100 f/2.8 L Macro IS, 10-22 f3.5-4.5, 17-55 f/2.8 L IS, 85 f/1.8, Canon 1.4 Extender III, 5 Canon 600 EX-RT, 2 Canon ST-E3 Transmitters, Canon PRO-300 Printer