I have this upcoming job in a few weeks time and needed some sort of suction cups to mount my Canon 5DmkII and Panasonic AG-AF101 inside and outside a car. Last year I rented a mount but felt it could be improved upon.
This support kit comes in a foamed bag with all parts except a pan/tilt head so I mounted a Manfrotto 391RC head I'm using on my skate dolly. It seams to be flexible with a central hub that has many holes which will allow mounting in many directions.
Three suction cups with a nice grip feeling to them. Okay quality rubber and plastic parts that will have some flex which can reduce motor vibration. In contrary to an all metal mount which just transports vibrations to the camera and causes micro jitter.
There are six ball joints to mount and fix in almost any position and nine "rods" in different lengths. According to the manual it holds up to 3.5kg which is safe considering a 5DmkII with lens is under 2kg and between 2-3kg for the AF101 with lens.
We'll see how it performs with these cameras and how bumps and vibrations are reduced or enhanced.