I am considering purchasing a 2014 cruise 1LT base model for around 16k (gm family discount) with around 3k miles on it. It has been used mainly as a rental car for those who have their car undergoing service. It would be given the full warranty from 3k miles. Does anyone have experience on these demo/service cars? would the offer worth it? anything in particular i should be aware of when dealing with these demo cars?