Wow, I couldn't disagree more. I have three FlexTT5 and two MiniTT1s triggering a 580EX, a 580EXII, and a 550EX from either a 1DmkII or a 5D. I have absolutely LOVED the Pocketwizard system, in either ETTL or manual mode. The new AC3 Zone Controller allows me to control flash power (again, ETTL or manual) without leaving the camera position, and with the AC5 "sock", radio interference is no longer an issue (with the 580EX...the 550EX never had any issue to begin with, so that's the light I usually position furthest away from the camera).
And on the few times I need to shoot with studio strobes, HyperSync allows me to increase my X-sync speed so that I can easily overpower the ambient light.
The Flex/Mini system isn't cheap, but it's SO flexible and (finally) works as advertised.
100% highly recommended.