Some Ofna MBX buggies come with the standard hinge arms, others come with the pivot suspension arms on the rear. Other than being able to adjust rear toe-in, are there any other advantages?
Smoothness, ease of adjustment, and reliablity come to mind. The PBS setups are very durable (look at the T-maxx) and they offer a lot smother ride than the conventional setups.
My MBX R2 has front & rear PBS, I might guess it's easier on the differentials too from hard jump landings than the H pins and hubs. The C-Hubs are the next best suspension setup though.