I have my small business card from CP, and I really like the fact that the expedited parcel service is the same price as the standard service. So, you get a tracking number and a better shipping delay for a good price.
i've been using this for a couple months now i must say its very good. they few % discount isnt huge, its the online shipping tools thats awesome. i can draw up all the info online, the approximate weight/height etc.... and have a tracking number and printout printed in minutes. simply tape on the portion to the box, drop off at CP, no waiting or anything.