National has no doubt the best rental program in the industry (The Emerald Club). At major airports, you can completely bypass the counter and choose any vehicle in your reserved class. Or, if you reserve an intermediate size car, you go to a special area called The Emerald Aisle. The cars on the Emerald Aisle are at least intermediates, but you may have the choice of taking larger vehicles like Minivan's, SUV's or Convertables at no extra charge!! In smaller locations, you preceed to the special Emerald Club line, where you cut in front of everyone and sign a few papers and you are on your way. There really are no cons, beside the $50 fee for joining, which is currently being waved.