My experience with these guys have been pretty positive. Mind you this was my first time using them and they already left me with a good impression so that's something!
A normal cab ride for me to the airport is usually $100 after tips because I live in the burbs. Given that I was traveling on business and wanted to save the company money, I decided to look up airport shuttle services online for a fixed rate and this company was listed first on google. It got decent reviews on yelp so I'm like hey why not? What's to lose?
I asked for them to pick me up at 8:30am initially for the next day and then later changed my mind to 8am. They were very accommodating. Day of, they arrived 5 mins early and rang my doorbell to let me know he arrived. He helped me load my luggage and offered a quiet and respectful ride the entire way. Traffic was good and I ended up only paying $58 flat rate. That's cheaper than cabbing from dt!
Overall I would use them again and I do recommend them.