An experimental/homebuilt of similar but not exactly the same design, the Dyke Delta https://en.wikipedia.org/wiki/Dyke_Delta of which about 50 have been built, has its pilots reporting a comfortable ride.
Another one I'm familiar with: https://www.verheesengineering.com/d2-twoseater/
Another one I'm familiar with: https://www.verheesengineering.com/d2-twoseater/