"I don't really have any suggestions on improvements. I was treated very nicely with a lot of courtesy and professionalism by Service Advisor, Sergio Llamas. I sincerely hope that this information will be passed onto the Corona Discount Tire Center on 6th St., in Corona. All of the staff were very polite and the Goodyear tires I received are making quite a difference driving around with my Mustang! Thanks to all the staff - with additional gratitude to Sergio Llamas!! Sincerely, Heidi Blazer"