So took out the Flex TT5 today from pocket wizard and did some test shots with my little man. I must say I'm pretty happy with them. Definitely beats having to do all manual on my old PW Plus II. These are all in E-TTL btw with the Flex TT5 hooked up to a lightstick and a 580 EXII. I'm also using another Flex TT5 on the camera's hot shoe as a transmitter. The off camera flash was always pointed towards the sun to fill some shadows on my son. So I measured the distance between the camera and flash and I was getting pretty responsive triggers at 35 ft range or less. Beyond that it wasn't too reliable. LOL this must be my first non natural light post. Edit: Also forgot to point the the obvious high sync(love it). For those who don't mind the distance of the limited 35ft range I think the Flex will serve your purpose. Radiopoppers are great too but to cheapy material wise. I sold mine(radiopoppers) soon after I got them last year. 1 2 3 4 5 Don't mind the stofen on the top right.