If I understood the wikipedia-article correctly, it is quite easy to tune a car with this kind of suspension, as changing one aspect of the tuning, doesn't affect other aspects.
Also, camber and caster are much more stable. When a car lands from a jump, or rolls in a corner, with a conventional suspension the camber-angle will change, but not with this type of suspension, so it is much more consistant and the suspension can move more freely.
(source: wikipedia)
On this picture you can see that movement of the wheel does not affect the angles.
Drawside is the more complex build ... and you have more parts to maintain, or that can fail.
... and according to the wikipedia-article, a swaybar is needed to control (slow down) the chassis rolling.
... So all Elvo has to do now, after testing this suspension, is building it also into his S2.
Next thing you know, conversion kits are sold lol