I also got one of those coupon things where they punch out each oil change for a year. There was a slight problem with the coupon. As a big note to everyone, this is not the fault of Big O Tires but the advertising agency that sold the coupon. I only state this as a warning to others. The person that sold it to me said that I could receive synthetic oil changes at no extra cost, just with 3 oil changes instead of 5. When I went to Big O, I told them this deal and they said that no such policy was true but they had heard this incorrect information before. They were so awesome that they honored that deal even though it wasn't the original policy! I was so pleased and grateful! They completed the oil change quickly and treated me with respect. :)
I came back another time after getting a huge screw in my tire. They fixed the tire for $17 or so and rotated my tires at no charge.
Sometimes they do get quite busy at maybe 1.5 - 2 hour wait for an oil change so call in before.
Despite these other less than great reviews, I can only tell you of what I experienced. These guys have been straight with me, friendly, and helpful. I'll keep you all updated on my later experiences if that should change but they've been great!