I had a tour guide who spoke both Mandarin and English. Since the other 11 people in the group spoke English, I asked him to conduct the tour entirely in English. His English was easy to understand, suitable for someone with an average proficiency, but there were times when the guide would specifically confirm details with me in Mandarin. He provided very clear explanations of the attractions, itinerary, and historical background along the way. As I had a flight departing that evening, I would recommend this half-day light tour to anyone who has other activities planned for the evening in Las Vegas.