My experience with this rental agency was very good for the price. The usual agencies were charging outrageously high rates so I was attracted by this lower cost option presented by Kayak. I was a little nervous after seeing the previous one star review, but I decided to check it out anyway. Here's how it went. My flight arrived late at night, so I stayed at an airport hotel. Called Routes the next day and asked to be picked up from the hotel. I specified a time, and got ready to go. Got a call soon after that they would be a little late since they were also going to be picking up a group from the airport. Score one for good communication. I was picked up within half hour from the original time, and the rental transaction proceeded smoothly from there. Now these are not new cars; the one I got had some dents which were properly noted, and I was on my way. Checking out from the agency location was just as fast, if not faster and easier than the big guys.
The car (a Kia) ran well for the week I had it. I returned it without any problem, and was quickly shuttled to the airport.
So if you want to save a lot of money, and understand the way they operate, Routes in Calgary offers an excellent deal.