Pros:I liked how easy it was to rent using the kayak interface BUT, we weren't within our pickup window which is apparently 2 hours from the time you indicate (we were ~3 due to unforeseen circumstances), and they told us that we needed to upgrade to their highest bracket of car because that was all they had left. Even if we had wanted to use one of the other rental places in the area, because we booked through kayak, we would've lost our deposit. They also tried to scare us into buying extra insurance and just generally seemed ready to squeeze any extra money out of us that they could. The facilities were also pretty lacklustre- the women's bathroom was out of soap and tolit paper- overall, I wish we would've booked a more expensive rental place.
Cons:The rental pickup location is also very out of the way from the airport- I think they have a shuttle but it's difficult to get to via public transportation.