I had a negative experience with Uber last night at Ezeiza.
After I cleared customs, I looked for Uber on app...they allocated me a driver who was 10 minutes away. The driver messaged me that he is coming. Then when he was 3 minutes away, UBER said, we have changed yr driver as this one is closer and he was 14 minutes away! Anyway, i waited for him. I contacted him. Ultimately there were so many people at departures that neither he could find me and neither I could find him. I told him where I was waiting, but he wanted me to walk all over the place and find where he is!
basically i lost about 35 minutes after i was out in arrivals in my bid to take uber! Subsequently, I took a remi which cost 690 pesos to palermo and it was very efficient.
My final call on UBer at Ezeiza - yes, you may save 100 pesos but its a lot of trouble and stress and lot of patience required to get it at airport. For a new tourist, you are vulnerable walking out in open with your phone in hand, luggage in tow and possible dollars in yr pocket trying to search the UBER in a maze of cars. Suggest to take the remi especially if you can be vulnerable and arriving with valuables and cash and dont want to expose yrself to all sorts of characters outside at the airport.
Late nights, at 2-3 am, when Ezeiza airport is less crowded, there is no UBER avbl anyway.
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Going to Ezeiza from city, its best to take a uber. cost me 507 pesos from palermo few days ago. Return Journey - best to take a airport remis though its super expensive. Some remis were asking 850 yesterday to palermo! There are about 5~7 different companies. Suggest ask each of them the price and then take the cheapest one as all are same! Its a luck of draw if you get a good driver who knows the route or a stupid driver who will use GPS and depend on yr directions/ guidance on the route to take to bring you to yr final destination!