It’s a great upgrade for any weight rating vehicle. And you will certainly notice it, even over your T32 ARBs.
They obviously help further to reduce the body roll, as well as lightening the steering and reducing the understeer that a decent suspension will already have done.
They are great on a camper with the extra weight but also help massively on a panel or kombi van with the points above.
Personally I always upgrade the arbs on my van, but I really drive it hard at times and enjoy the extra feedback and control you get with them, as well as when driving normally.
As we always say suspension is very subjective and is best to test setups for yourself, to help decide which is best for you. We are lucky enough to run a few vans with the different setups, so we can offer back to back demo drives with customers - we have a brilliant test route ove some really good and really poor roads, so you can fully test the suspension in all conditions.