Recently I put my 3rd set of tires on my car. Here are some lessons I had to re-learn. Comfort - A set of tires can make a huge difference in the comfort of your ride. I need to go to tirerack.com every time and check the ratings for comfort. They also have ratings on lots of other important aspects of many brands of tire. Rotating - Towards the end of the lifespan of my previous set I was not rotating on a regular basis, so the tires began to wear unevenly. Why wasn't I rotating? Because it was inconvenient & out of my way. This time around I installed at Costco with hopes that I'll already be there - so I should be able to stay on a good rotation schedule. Also, I found out that Costco sends reminders for rotating if you want them to. Installers fees - when shopping you have to pay attention to the details. I tracked every expense each installer had which included warranty, install/disposal fees, TPM (tire pressure management fees), sometimes differ