Had one in my 160 Yari. The issue I had was trying to get the balance between mid travel support, ramp up and plushness off the top. Using tokens and air would fix one, but then adversely affect the other. For example, less tokens meant less harsh ramp up, but needed more air so less plushness off the top.. More tokens, less air, so more plushness but ramp up too harsh. The ramp control basically allowed me to isolate the ramp up and get that right without effecting the rest of the travel so could run less air giving more plushness off the top.
Having said that, I now have the amazing luftkappe, so no need for the ramp control – this gives even more plushness and mid travel support which obviously the MRP is not really designed for. I think the ramp control on its plushest setting was equiv of 1.5 tokens, but with a the luftkappe in, ramp up was a little harsh so I run no tokens at all.