We have had many changes to our two trips this year, one domestic last month and one European adventure coming up soon. All booked through AK. Due to the inevitable changes, some airline caused (BA, I am looking at you!), some driven by various COVID restrictions (Italy requiring quarantine if you even change planes in the UK), and some by personal preference of this traveler, I have had cause to call AK several times since May.
AK answers the phone promptly! The longest wait on hold to get to the first agent was never more than 5 minutes. Every agent was a gem, handoffs to specialty colleagues (we booked with miles on partner airlines) were flawless, and every time they were able to resolve my issues. In fact, the latest change resulted in a refund of 10K miles and $1400!
They have my loyalty and I will pay more to fly AK if needs be.