Here is where the OP says it,
Originally Posted by
whitedoor
He could not get on another LGA-ROA itinerary, all booked up already. The only option was GSO and he did ask for compensation before getting on the plane. They kept telling him to ask when he got there. When he got to GSO, they told him that his only recourse was the web complaint form.
I do believe that the customer should be compensated for the rental car since he could not be re-accommodated to ROA in time for his meeting and because the cancellation was mechanical.
And the voucher seems fair for the inconvenience of having to drive two hours in a rental car to his final destination.