What goes around.... Agents have always been good to me on the phone and in person (save a few examples in YYZ).
Recent case of asking to have Mom and me seated next to each other across the aisle on my flight (today - YUL/FRA) I arrive at the airport and we are 5 rows apart. Agent on the ground shows that out itins are not linked, but is unable to give us the desired seats. We do get to sit together although one of us is in the middle. Anyway, the concierge in YOW (she was an absolute star in CP days) even tried without success and I am but a lowly Elite. Arrive in YUL and the MLL agent has at least got us closer to each having an aisle close to one another and promises to try as flight time approaches.
Anyway, this long winded incopmprehensible story to say that with rare exception that AC phone and ground staff are great.