Jeff,
Saw them put it in Mississauga more than 10 years ago when this was a new system.
It is an excellent system. NO damage, very minimal disruption, and it works. That I can confirm. They've done this at many well known clubs, just check out their list of clients.
It works by cutting drain lines right into the native soil, that is either backfiled with the native material or with an appropriate sand in bad soils. It works like any green drainage would.
They dig the lines with which ever equipment the site demands, on plywood, and they remove any excessive soil left over. The sod is stripped by custom shovels that ensure a nice clean trench (and the sod goes back in just as clean as it's cut. Ready for play almost immediately.
It costs around 10,000 US for the average sized green.