We had a short time in Buenos Aires and Mariano helped us see so much of the city! His English is excellent, and he was very friendly, laid back and patient. He was very knowledgeable about each location we visited. We did an overview of the entire city because we had a short time. But we could have customized the tour any way we needed if wanted to spend more time in a particular area, or if we wanted to skip something we had already seen. My favorite parts were the Recoleta cemetery and the colorful tenement houses in La Boca. My husband liked the embassy houses in Palermo. We needed something to eat so Mariano took us to the San Telmo market which has every type of restaurant you could think of, along with produce, meat, antiques and other goods. He waited on us patiently while we ate. I would highly recommend this tour to anyone who has a short time in the city. We never would have been able to see so many things on our own. And if you book the tour, ask for Mariano!