If I reserve a compact car and use the 2 car class upgrade, I get a reservation for a standard car. The National website doesn't have any descriptions of that category when I go to vehicles. What is a standard car? For my 5 day rental in June, it is $11 cheaper to use the upgrade coupon instead of the $20 ent coupon ($104 vs $115). Using the upgrade means I would also have to go to the counter, so I am trying to figure out if that is worth saving $11! Decisions, decisions.