It raised mine about 2". If I had immediate plans to level it that would be fine, but that's not my first priority right now. I still experienced porpoising ... which could be due to having it on the 40% setting. Lastly, when I was not towing, the damn things would squeak. I called their customer service to figure it out. Their initial thought was it was contacting the light leveling sensor but after triple checking it, it cleared fine. They agreed the squeaking was unacceptable and I took them up on returning the product.
I dont think the RAS is a bad setup or product, but given the issues I experienced, I decided it was not for me. Airlift on the way soon ...