If you do think you need it I would wait at least a month. Get a good feel for the base performance of the LR MY. Then if you buy the AB you’ll have a better base of comparison. Doing it too quick after purchase you’ll never really appreciate what it adds.excellent. I was totally planning on getting this but maybe I should just use the standard quickness of the car as I will likely be a great change from my VW atlas! Good to know there is a demo period.