I have used Roadrunner twice a week for the last six weeks. That should tell you a lot! They are, by far, the best priced car service in town, but that is NOT why I use them. My employer pays for my expenses, so I use the company that treats me the best & that is ALWAYS Roadrunner.
The PROFESSIONAL drivers each have their own vehicle, so they take extreme pride in their vehicles and it shows. The vehicles have all been impeccable (and I am a car guy). The drivers are very professional, until I start cracking jokes with them & then they are 'customer service' wise enough to lighten up & joke with me, like a good waiter that adjusts his personality to make the customer more comfortable. They are consistently: professional, courteous, prompt & EAGER to please.
I very rarely put my reputation on the line by recommending someone else, but I recommend Roadrunner without any reservation!