Uber for transportation is the very cheap and very easy. For the airports, definitely recommend a remis service or TaxiEZE - you can order when you land. It's about $40-$50 for EZE transport, traffic in the city is fun. The reciprocity fee going into Argentina was waived a year or two ago so that is really nice.
The blue market for cash is not so relevant anymore as they changed their policies on the dollar. Recommend exchanging at the airport (B of A would not let me order in advance as they said the currency was too volatile) or Galerias Pacificos (Av. Crdoba 550) at Retiro/San Telmo border
We were only in BA for a few days but I'd recommend the following:
- Dinner at La Carniceria in Palermo - MUST HAVE RESERVATIONS! only takes them via phone (and I had luck on facebook). If you're going to be there for a week I would seriously consider going twice. It was good!
- If you're looking for very fancy, Aramburu was great. We heard bad things from someone else about Tegui (another fancy place). Another slightly less expensive place but great food was Roux in Recoleta
- We did a 1/2 day tour with Joy of Buenos Aires. Highly recommend!! If we had to do it over again we'd do either a full day or 2 half day tours
http://www.joyofbuenosaires.com/homehttps://www.tripadvisor.com/Attraction_Review-g312741-d9705823-Reviews-Joy_of_Buenos_Aires-Buenos_Aires_Capital_Federal_District.html- CoRE Italian Street Food (Maipu 819) was a fun quick casual place for lunch at Retiro/San Telmo border
- Floreria Atlantico was fun for a drink (it was packed!)
- Tour El Zanjon (Defensa 755), this was super informative
http://www.elzanjon.com.ar/enhttps://www.tripadvisor.com/Attraction_Review-g312741-d1528105-Reviews-El_Zanjon_de_Granados-Buenos_Aires_Capital_Federal_District.html- Palacio Barolo tour was not fabulous but the views are incredible!
https://www.palaciobarolotours.com/site/enhttps://www.tripadvisor.com/Attraction_Review-g312741-d646346-Reviews-or10-Palacio_Barolo-Buenos_Aires_Capital_Federal_District.html- Pain et Vin in Palermo (Gorriti 5132) wine tasting or glass of wine
https://www.pain-et-vin.com/home- Le Pain Quotidien right by your hotel in Recoleta and Farinelli in Retiro are two super cute cafe / bakeries
- Buenos Free Walks does a bunch of tours, we did the 'paid' Recoleta Cemetery one and would recommend
http://www.buenosairesfreewalks.com/recoleta-cemetery-tour/- Parque 3 de Febrero is the rose garden but will probably be past-prime in April. Overall the parks in that area are a nice place to walk around
- Museo Nacional de Bellas Artes is their general art museum. We spent a really nice 1.5 walking around (it's a nice size) with all different types of art. Not a huge collection but nicely done
http://www.bellasartes.gob.ar/enhttps://www.tripadvisor.com/Attraction_Review-g312741-d311757-Reviews-Museo_Nacional_de_Bellas_Artes-Buenos_Aires_Capital_Federal_District.htmlThere were other art and buildings we had our list that we didn't make it to. If you can go someone else in Argentina, I'd highly recommend El Calafate. Glaciars, dinosaur bones, birds, etc. You probably could not go wrong doing other locations but that would be my #1.