I now have:
Yongnuo YN568EX II Flashgun
Yongnuo YN568EX II Flashgun
Yongnuo YN622C TTL Trigger
Yongnuo YN622C TTL Trigger
Yongnuo YN622c TX Master Unit
Neewer 2m Lightstand
Neewer 2m Lightstand
4 assorted Brollies, shoot-thru / Reflector.
Grey & White collapsible background 2m x 1.5m
The whole lot was just under £300 new.The price of just one equivalent Canon Speedlite is around £350-£400 alone.
I reckon that to get an amateur, 2 light, setup like this using "branded" studio gear would be closer to £1500.
A Yongnuo 568 + Trigger is £100. A Canon 600 + Pocketwizard Trigger is around £500
The Yongnuo gear is TTL and fully controllable from the TX Master unit. It's very impressive for the price. I'd much prefer 4 Yongnuos than 1 Canon flash, that's for sure.
The ONLY difference I can find is that Canons can be externally powered, essential for a Pro or semi-pro but not so for me (My life is already 30% devoted to recharging AAs anyway).