I'm glad the comments get passed down to the crew as indicated in the responses from AC.

One thing I always do is send in a copy of my BP, either in PDF or hard form. I do it to establish with a high probability that the letter is indeed coming from the pax.

This year so far the best experience I had on any airline (Amongst: AC J long hauls, SQ J/Y, NH J, TG J/Y, LH J, UA Y) was in fact on the domestic leg of AC 10 YYC-YYZ. The cabin crew seemed all to be under 30 years old yet they provided such great service with close attention to details, specially the SD who was such a pleasant gentleman. I was really surprised and pleased with their excellent performance and glad to see AC training doing an obviously great job.

ACYYZ/SD watch out for the new kids buddy.