For this taxi company, you cannot book a cab the day before. Instead you need to call them when you need the taxi, preferably a couple of hours in advance. Because of this inconvenience and because of the unfavorable reviews I'd read, when I needed a taxi for a trip, I booked one from another taxi company to pick me up at 5:30am the next day to catch a 5:57am train but in the end it is Yellow Cab that saved me. At 5:40am the next day (10 minutes after the schedule time), the other company's taxi still did not show up. When I called them, the driver was still sleeping! I called Yellow Cab at that time. To my surprise, their cab arrived almost right away. I had already given up on catching the 5:57am train but the driver was able to get to the train station 2 minutes before the train! I'd recommend Yellow Cab and use them again. Just keep in mind, you may need to give them a couple of hours. Also, their price is reasonable.