I still use UC 3.0 via TCP/IP from a Windows 2000 (NT5) computer. It works fine for making reservations. Viewing Mileage Plus mileage summary displays incorrect flight dates.

However, there have been several instances during the past several months when lower fares (not weekend e-fares) were available for selected Shuttle markets on United.com that were not available via UC 3.0, Travelocity or the other booking engines.