i dont think its a great idea to break it in like they say then ALL OF THE SUDDEN smash on the gas and redline through each gears. even though i passed the break in mileage mark i still inched up the rpm range until getting to red line. to each there own but im doing what "feels" right to me.
the vibration..... yea its normal
one last thing. i would take the instructions and advice of the engineers who built the car over the technicians at the dealership. its true the car will learn your driving habits but that can be reset. also my nismo is my dailey driver. as much as id luv to fly to work doing 130 redlining each gear 24/7, that just isnt practical.