Having made reservations through the website a few times, I called today to move-up a week. The representative (Rachel) was helpful and while I expected to pay a change fee, there was none. Having called before, I expected another smooth experience, and got it! I had to step away from phone a few times for business and she remained and brought everything through just fine. I got the confirmation e-mail, and everything is just peachy. I told her about this portal and she'd never heard of it until today. A good experience.