One issue I didn't see mentioned is the slow 2-3 shift when cold that shows up on some Q's (mine is one of them unfortunately.) This really only shows up when cold and under light throttle loading, so don't let anyone do you a "favor" by warming the car up before you drive it. If you get the Infiniti records, check to see if the trans fluid has been changed recently, if it has, I would say they are tryign to hide this problem from you....
There are several threads on this, so just do a search for more info.
