I visited about 15 hotel & casinos on the Strip, and I really liked the Venetian Hotel the best. The decor is fun, the staff is friendly and helpful, and the air quality was among the best of the Strip casinos. The rooms were spacious, clean and comfortable. Clearly a world-class establishment.
Like every other hotel & casino in Las Vegas, smoking is allowed pretty much anywhere. As a non-smoker, that bothered me some, but compared to other hotels on the Strip, only the Mirage had better ventilation.