What is Riv built on, sand or clay?
Im not a member of the kyk fan club, but on hard clay it works well, as the extra sponginess does make such course more playable, and as long as its maintained well and kept short its fine. And of course it does make a course play longer
Its also very tough and drought tolerant so a good grass in tough areas as you cant kill it with a brick.
On sand base however, I find it a waste, as the extra buffer to an extent removes the ability to squeeze the ball against the turf. But again its easy to grow and cheaper to maintain, and so it the grass of choice on munis and lower end private tracks