Been using GrippaVac for a number of years now, and they are a great tool for regular work, but a fantastic tool for high level or awkward work.
We have used ours over 40ft regularly, and combined with the various nozzles/tools they have, and a camera, it works very well.
Recently upgraded to the clamped poles, and found them an improvement over the older style, you don't get the tools or sections spinning or slipping, enabling an element of force to be used when required.
The agitator tool is a great addition, with the bonus of allowing you to flush through to ensure everything is operating as it should.