My buddy bought a car at Carmax and their service is not really that great. I'm not saying they are bad, just not real super knowledgeable. I can't really hold that against them. They are a used car lot with many different brands to worry about. I'd look into a Nissan extended warranty if you're wanting one. I don't know for sure if you can do that, but it'd be worth asking.
What color/model are you getting?
And welcome.
