Mate I love the Simplicity Suspension. I have a custom made 3 meter dual axel tray top trailer I cart 4 wheelers out to the Gulf Country. Rated , I got the 2500 kilo setup under it & mate that thing goes anywhere my truck goes & then some. I am so happy with it I have ordered it on my 18-57.8 to arrive in November. Cant wait. Best thing you could do is go for it & get it. Go onto the website. Its manufactured in Melbourne & is a very simple but fully functional system. You have tow in & tow out on each wheel, for the purpose if your setup is chewing out wheels, as tandem setup do. ( Nature of the beast) Simplicity by name , Simplicity by nature.
Have you heard of the Engineers quote of the " KISS METHOD" ? It stands for Keep It Simple Stupid. Great system to work by when designing anything. As is this system.
Good luck with your decision.