I went to Buenos Aires for working and had free time. Liz organized all very well as she is a tour guide since 10 years ago with lot of experience and so popular in the city of Buenos Aires. Very flexible, nice woman, and professional. She got wonderful reviews at trip advisor that help a lot to check info. She will be good to your tour during one day , 3 days or whatever you want. Gave her info about your days and hours free and she will be in charge to organize with local point of view and lot of education in tourism.