I just returned from a week-end wedding in Banff. I put my review up of our hotel (Buffalo Mountain Lodge. which was wonderful) but I also just had to mention the shuttle service as well so thought I would put it here.
We booked the Banff Airporter shuttle before we left and we were truly impressed by the wonderful experience. We had contact with several different employees and every single one was so friendly and professional, not to mention informative! The shuttel itself was clean and comfortable with amazing views of the mountains! The shuttle sits high up and has huge windows - its the best drive I've ever had to/from Banff.
I highly recommend this company!