I’ve been using variety of pocketwizard system through out my career. Pocketwizard multimax never failed and has always been my #1 choice of wireless transmitting unit when I shoot basketball, and studio work. My experience with pocketwizard mini TT1 and Flex TT5 wasn’t so great. After communicating back and forth with pocket wizard, they sent me a test version of AC7 which reduce the RF noise from Canon 580 EXII.
Many people reported that AC7 won’t work with external battery pack. But this new version actually comes with AC57 adapter which can be used with an external battery pack. I have connected canon 580 EXII with canon CP-E3 battery pack
I had to use AC5 with off camera cable to be able to extend the range of pocketwizard TT5 + canon 580 EXII combo. It works great but takes time set that up especially having multiple setups like this. Now with AC7 set up is relatively easy and I can quickly mount the flash on and off . For the range, I get solid result. Almost no misfire with canon 70-200 2.8 is lens. Huge improvement. Only complain I have is the size. Again, it’s extra piece of equipment I have to carry but it does the job.