It's fantasic, except for the buying tickets parts like:
getting fare quotes for other than the lowest fare,
getting fares for mixed fare trips,
or getting the last seat at a fare level,
or viewing award availability,
or viewing upgrade availaiblity,
or booking award travel with connections,
or changing your seats,
or preview seats available,
or seeing your EQM,
or seeing your itinerary
or getting real arrival and departure info....