I had some fitted at the same time as H&R/Koni coilovers (lowered about 70mm) so difficult to say what the ARBs alone add to the party. The van does lean slightly less but it is still a lumbering, slow witted 2.3T van with a heavy pop top high up and a rear full of cupboards. In no way would I describe it as car like! Maybe people without a camper conversion get better results.
I would say you would get better results by changing out the stock shocks which struggle with lowered springs (if that’s the set up you are on) as this will improve the ride and stability. Then add ARBs if you feel the need for more lateral control. They shouldn’t change the ride quality much, if at all. Have a chat with Steve at CRS when he is back from Xmas hols.