I have always stayed with original Canon gear - but the cost of the Canon ST-E3-RT is pretty extreme - but I know it is quality equipment, weather sealed and fully compatible with my 600EX-RTs. (It always bugs me that I could never buy two 600's at the same time to take advantage of the "Two 600Ex-Rt and St-E3-Rt package" offered at B&H. If I could, the price of the transmitter would have been $80 less - grrr. And sure enough, I now have two 600's - just not purchased at the same time.)
I know Youngnuo makes the YN-E3-RT for much less but it seems to have quality issues - some work, some have broken battery doors, smaller hot shoe fit - loose, etc.
Now comes the Phottix - priced right between the two units (Canon and Yongnuo).
The question is how good is the Phottix Laso? Seems better built but still not weather sealed. How is the AF Assist light on the Phottix; is it better than the Yongnuo? In practice, how important is the AF Assist? Other than reading the literature, does anyone have practical experience with these units that they can share? I do like that both the Yongnuo and Phottix have firmwear upgrade capability. The Canon does not but how often would this be needed? UPDATE: Correction - Canon units can have firmware updates but only by sending the unit to Canon.
In reading some reviews, the Phottix seems to have a greater range - although that was tested with their own receiver and not just the basic 600EX-RT - so I don't know if the extended range is transmitter to Phottix receiver or also to the receiver in the 600.
So, does anyone have actual experience with the Phottix Laso transmitter that they can share - quality, performance, features similar to the ST-E3-RT, etc.?
Thanks very much.