My last rental with Alamo, like they all have, went fine. However, because you get to grab whatever car you want out of your class asile, there isn't necessarily a car reserved and waiting for you. I took the last SUV in my class leaving a long empty row. Three questions: 1) Do Alamo and National share the same asiles, I swear the signs say both names 2) If they do not, because the companies are the same, can you grab a similar class from the National asile? 3) What if there are no cars in your reserved class? Are you allowed to self upgrade? Do you have to hunt down an attendant? Thanks.