I have more than a dozen bookings, with three big trips coming up. Once a while I go to see each of those bookings, in case the rate drops then I change. But it's so frequent that it's unable to display, with error message, or the "Update" button doesn't work, doesn't do anything.

Marriott seems to work well for doing initial bookings. But after that trying to display/update bookings, it seems so buggy.