I've been a customer for 12 years and service has been pretty hit-or-miss. Only had one bad driver in that time, but there's been at least a couple times where no one ever came. During the day, it often takes half an hour for a taxi just to get to the Uptown area. Which is just ridiculous.. At night, it tends to be much quicker, as they have cabs running regularly around areas of UC and Northside. I have waited half an hour at night around there for a cab to come, though. Also, expect to be on hold for around 5 minutes if you call at night on the weekend.
I live in the Sharonville-Blue Ash area and the last time I needed a cab only Towne would come to my area. I used them a few years ago and it took them over a good hour to arrive. This time the cab arrived in 10 minutes and I loved the driver. If you live in the Blue Ash, Montgomery, Kenwood area ask for Rose. She's been in the business for over 15 years and is awesome!!!
If you are looking for a fast taxi in Cincinnati, Yellow Taxi is the way to go! I use them anytime I need a cab and they are always on time. The drivers are friendly and quick to help out whenever I need an extra hand juggling the baby and the groceries, lol. I would highly recommend Yellow Taxi for their fast service, great customer service and clean cabs.