The only issue we had was the opportunity for seat selection from LAX to YEG. Since this was a WestJet flight, we could not select our seats on the Delta site which resulted in trying to navigate that with WestJet on a already full flight. I am claustrophobic so aisle seat is my preferred choice but was given a middle and window seat that i could not readily change. The WestJet attendant at LAX was greatly helpful and was able to find me an aisle seat however it was separate from my traveling companion. Beside that all was good.