I will not miss CP at all....
I fly out of YYZ into the US constantly. Many of the flights were served by both AA and CP (codeshares and whatnot...)
I have sat in both First and Coach on CP and the service was never that good. Heck, I got better coach service on AA than in first on CP.
I found the attendents rude, the food mediocre (at best) and the gate agents not able to do a simple codeshare checkin. I now routinely connect through ORD, regardless of the fact that CP (and AC) offer nonstops almost everywhere I go.