I've been a customer of Harrison Car Service since 2006. I'm a weekly traveler and I know all about the challenges of getting to and from our tri-state airports. I count on a car service to be consistently reliable, flexible (as my schedule can change fairly quickly), efficient, and courteous. Harrison has grown organically since it's early days and they have never lost focus of providing a quality service.
I prefer them to the much larger services because I know most of the drivers by name and they all seem to take pride in the relationship. With Uber or the other large services, it's more like "pot luck". You never know what you are going to get. I've used Harrison for business and personal travel, and would recommend them to anyone who is looking for excellent service to/from the airports (or other events) at a fair price.
Lastly, the service is a reflection of the people who run the business day to day, including Brendan, Bruce, and Jude. They treat their drivers the right way, and as a result there is clearly a mutual respect, and very little turnover. I proudly give my full endorsement.